{"timestamp": "2026-11-10 15:10:05", "data": {"options": [{"option": "BKF261120C00030000", "bid": 7.5, "bid_size": 326.0, "ask": 11.2, "ask_size": 333.0, "iv": 0.9318, "open_interest": 0.0, "volume": 0.0, "delta": 0.9719, "gamma": 0.0113, "vega": 0.0043, "theta": -0.0156, "rho": 0.0095, "theo": 9.3222, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.45000004768372}, {"option": "BKF261120P00030000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 253.0, "iv": 1.6658, "open_interest": 0.0, "volume": 0.0, "delta": -0.0284, "gamma": 0.0113, "vega": 0.0043, "theta": -0.0168, "rho": -0.0004, "theo": 0.064, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00031000", "bid": 6.5, "bid_size": 326.0, "ask": 10.2, "ask_size": 333.0, "iv": 0.8337, "open_interest": 0.0, "volume": 0.0, "delta": 0.9664, "gamma": 0.0143, "vega": 0.005, "theta": -0.0169, "rho": 0.0097, "theo": 8.3311, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 8.45000004768372}, {"option": "BKF261120P00031000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.5237, "open_interest": 0.0, "volume": 0.0, "delta": -0.0339, "gamma": 0.0143, "vega": 0.005, "theta": -0.0179, "rho": -0.0004, "theo": 0.0714, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00032000", "bid": 5.5, "bid_size": 326.0, "ask": 9.2, "ask_size": 333.0, "iv": 0.7378, "open_interest": 0.0, "volume": 0.0, "delta": 0.9592, "gamma": 0.0184, "vega": 0.0058, "theta": -0.0182, "rho": 0.01, "theo": 7.3418, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 7.45000004768372}, {"option": "BKF261120P00032000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.3837, "open_interest": 0.0, "volume": 0.0, "delta": -0.0411, "gamma": 0.0184, "vega": 0.0058, "theta": -0.0192, "rho": -0.0005, "theo": 0.0807, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00033000", "bid": 4.5, "bid_size": 333.0, "ask": 8.2, "ask_size": 333.0, "iv": 0.6438, "open_interest": 0.0, "volume": 0.0, "delta": 0.9497, "gamma": 0.0242, "vega": 0.0069, "theta": -0.0198, "rho": 0.0102, "theo": 6.3549, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.40000009536743}, {"option": "BKF261120P00033000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.2453, "open_interest": 0.0, "volume": 0.0, "delta": -0.0507, "gamma": 0.0242, "vega": 0.0069, "theta": -0.0206, "rho": -0.0006, "theo": 0.0924, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00034000", "bid": 3.5, "bid_size": 246.0, "ask": 7.2, "ask_size": 333.0, "iv": 0.5512, "open_interest": 0.0, "volume": 0.0, "delta": 0.9365, "gamma": 0.0326, "vega": 0.0083, "theta": -0.0216, "rho": 0.0103, "theo": 5.3717, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.05000019073486}, {"option": "BKF261120P00034000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.1078, "open_interest": 0.0, "volume": 0.0, "delta": -0.064, "gamma": 0.0327, "vega": 0.0083, "theta": -0.0223, "rho": -0.0008, "theo": 0.1077, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00035000", "bid": 2.55, "bid_size": 246.0, "ask": 6.2, "ask_size": 246.0, "iv": 0.4883, "open_interest": 0.0, "volume": 0.0, "delta": 0.9173, "gamma": 0.0454, "vega": 0.0101, "theta": -0.0236, "rho": 0.0104, "theo": 4.3942, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 5.05000007152557}, {"option": "BKF261120P00035000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 0.97, "open_interest": 0.0, "volume": 0.0, "delta": -0.0832, "gamma": 0.0457, "vega": 0.0102, "theta": -0.0242, "rho": -0.001, "theo": 0.129, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00036000", "bid": 1.6, "bid_size": 246.0, "ask": 3.7, "ask_size": 12.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": 0.8878, "gamma": 0.066, "vega": 0.0127, "theta": -0.0259, "rho": 0.0103, "theo": 3.4268, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.67500001192093}, {"option": "BKF261120P00036000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 0.8309, "open_interest": 0.0, "volume": 0.0, "delta": -0.113, "gamma": 0.0664, "vega": 0.0127, "theta": -0.0264, "rho": -0.0013, "theo": 0.1603, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00037000", "bid": 0.65, "bid_size": 246.0, "ask": 4.2, "ask_size": 246.0, "iv": 0.3335, "open_interest": 0.0, "volume": 0.0, "delta": 0.8385, "gamma": 0.1004, "vega": 0.0162, "theta": -0.0285, "rho": 0.01, "theo": 2.4794, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.60000002384186}, {"option": "BKF261120P00037000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 333.0, "iv": 0.6994, "open_interest": 0.0, "volume": 0.0, "delta": -0.1628, "gamma": 0.1012, "vega": 0.0163, "theta": -0.029, "rho": -0.0018, "theo": 0.212, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261120C00038000", "bid": 0.0, "bid_size": 0.0, "ask": 3.3, "ask_size": 294.0, "iv": 0.3376, "open_interest": 0.0, "volume": 0.0, "delta": 0.7467, "gamma": 0.1585, "vega": 0.0212, "theta": -0.0315, "rho": 0.0091, "theo": 1.5818, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.70000004768372}, {"option": "BKF261120P00038000", "bid": 0.0, "bid_size": 0.0, "ask": 1.85, "ask_size": 294.0, "iv": 0.5693, "open_interest": 0.0, "volume": 0.0, "delta": -0.2558, "gamma": 0.1602, "vega": 0.0213, "theta": -0.032, "rho": -0.0028, "theo": 0.3141, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.425000011920929}, {"option": "BKF261120C00039000", "bid": 0.0, "bid_size": 0.0, "ask": 2.4, "ask_size": 246.0, "iv": 0.4047, "open_interest": 0.0, "volume": 0.0, "delta": 0.5705, "gamma": 0.2233, "vega": 0.0259, "theta": -0.0342, "rho": 0.0071, "theo": 0.8408, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.29999995231628}, {"option": "BKF261120P00039000", "bid": 0.0, "bid_size": 0.0, "ask": 2.05, "ask_size": 246.0, "iv": 0.4396, "open_interest": 0.0, "volume": 0.0, "delta": -0.4347, "gamma": 0.2264, "vega": 0.0259, "theta": -0.0347, "rho": -0.0044, "theo": 0.575, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120C00040000", "bid": 0.0, "bid_size": 0.0, "ask": 1.85, "ask_size": 245.0, "iv": 0.4738, "open_interest": 0.0, "volume": 0.0, "delta": 0.3603, "gamma": 0.1991, "vega": 0.0247, "theta": -0.0347, "rho": 0.0045, "theo": 0.4456, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.0}, {"option": "BKF261120P00040000", "bid": 0.0, "bid_size": 0.0, "ask": 2.6, "ask_size": 77.0, "iv": 0.3314, "open_interest": 0.0, "volume": 0.0, "delta": -0.6474, "gamma": 0.2022, "vega": 0.0245, "theta": -0.0351, "rho": -0.0059, "theo": 1.1845, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.699999988079071}, {"option": "BKF261120C00041000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 301.0, "iv": 0.5934, "open_interest": 0.0, "volume": 0.0, "delta": 0.2333, "gamma": 0.1375, "vega": 0.0202, "theta": -0.0332, "rho": 0.0029, "theo": 0.2908, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261120P00041000", "bid": 0.05, "bid_size": 616.0, "ask": 3.5, "ask_size": 76.0, "iv": 0.0, "open_interest": 1.0, "volume": 0.0, "delta": -0.775, "gamma": 0.1401, "vega": 0.0198, "theta": -0.0335, "rho": -0.0065, "theo": 2.0342, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 1.65, "last_trade_time": "2026-10-09T09:30:02", "percent_change": 0.0, "prev_day_close": 1.79999995231628}, {"option": "BKF261120C00042000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 323.0, "iv": 0.7042, "open_interest": 0.0, "volume": 0.0, "delta": 0.1646, "gamma": 0.0951, "vega": 0.0164, "theta": -0.031, "rho": 0.002, "theo": 0.2165, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00042000", "bid": 0.95, "bid_size": 246.0, "ask": 4.5, "ask_size": 62.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.8436, "gamma": 0.0974, "vega": 0.0158, "theta": -0.0314, "rho": -0.0064, "theo": 2.9633, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.12500005960464}, {"option": "BKF261120C00043000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 323.0, "iv": 0.8142, "open_interest": 0.0, "volume": 0.0, "delta": 0.1238, "gamma": 0.0687, "vega": 0.0136, "theta": -0.0288, "rho": 0.0015, "theo": 0.1725, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00043000", "bid": 1.95, "bid_size": 246.0, "ask": 5.5, "ask_size": 65.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.8844, "gamma": 0.0707, "vega": 0.0128, "theta": -0.0292, "rho": -0.0065, "theo": 3.922, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 3.62500005960464}, {"option": "BKF261120C00044000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 323.0, "iv": 0.9159, "open_interest": 0.0, "volume": 0.0, "delta": 0.0972, "gamma": 0.0517, "vega": 0.0114, "theta": -0.0268, "rho": 0.0012, "theo": 0.1431, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00044000", "bid": 2.95, "bid_size": 246.0, "ask": 6.5, "ask_size": 65.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.9108, "gamma": 0.0534, "vega": 0.0106, "theta": -0.0272, "rho": -0.0062, "theo": 4.8948, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.57500004768372}, {"option": "BKF261120C00045000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 323.0, "iv": 1.011, "open_interest": 0.0, "volume": 0.0, "delta": 0.0788, "gamma": 0.0402, "vega": 0.0097, "theta": -0.0249, "rho": 0.001, "theo": 0.1218, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00045000", "bid": 4.0, "bid_size": 231.0, "ask": 7.5, "ask_size": 77.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.929, "gamma": 0.0419, "vega": 0.0091, "theta": -0.0253, "rho": -0.0062, "theo": 5.8752, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 5.55000007152557}, {"option": "BKF261120C00046000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.1008, "open_interest": 0.0, "volume": 0.0, "delta": 0.0654, "gamma": 0.0321, "vega": 0.0084, "theta": -0.0232, "rho": 0.0008, "theo": 0.1058, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00046000", "bid": 5.0, "bid_size": 242.0, "ask": 8.5, "ask_size": 77.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.9423, "gamma": 0.0335, "vega": 0.0075, "theta": -0.0236, "rho": -0.0056, "theo": 6.861, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.5499997138977}, {"option": "BKF261120C00047000", "bid": 0.0, "bid_size": 0.0, "ask": 0.4, "ask_size": 100.0, "iv": 0.7641, "open_interest": 0.0, "volume": 0.0, "delta": 0.0554, "gamma": 0.0262, "vega": 0.0074, "theta": -0.0217, "rho": 0.0007, "theo": 0.0931, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00047000", "bid": 6.0, "bid_size": 231.0, "ask": 9.5, "ask_size": 77.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.9522, "gamma": 0.0275, "vega": 0.0066, "theta": -0.022, "rho": -0.0055, "theo": 7.8498, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 7.5499997138977}, {"option": "BKF261120C00048000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.2673, "open_interest": 0.0, "volume": 0.0, "delta": 0.0475, "gamma": 0.0217, "vega": 0.0065, "theta": -0.0204, "rho": 0.0006, "theo": 0.0829, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00048000", "bid": 7.0, "bid_size": 231.0, "ask": 10.6, "ask_size": 76.0, "iv": 0.5691, "open_interest": 0.0, "volume": 0.0, "delta": -0.96, "gamma": 0.023, "vega": 0.0056, "theta": -0.0206, "rho": -0.0046, "theo": 8.8408, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 8.5499997138977}, {"option": "BKF261120C00049000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.3449, "open_interest": 0.0, "volume": 0.0, "delta": 0.0413, "gamma": 0.0183, "vega": 0.0058, "theta": -0.0192, "rho": 0.0005, "theo": 0.0745, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00049000", "bid": 8.0, "bid_size": 231.0, "ask": 11.5, "ask_size": 77.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.9661, "gamma": 0.0194, "vega": 0.0048, "theta": -0.0191, "rho": -0.0047, "theo": 9.8339, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.5499997138977}, {"option": "BKF261120C00050000", "bid": 0.0, "bid_size": 0.0, "ask": 1.7, "ask_size": 333.0, "iv": 1.4195, "open_interest": 0.0, "volume": 0.0, "delta": 0.0363, "gamma": 0.0156, "vega": 0.0052, "theta": -0.018, "rho": 0.0004, "theo": 0.0674, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.875}, {"option": "BKF261120P00050000", "bid": 9.0, "bid_size": 231.0, "ask": 12.5, "ask_size": 77.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.971, "gamma": 0.0166, "vega": 0.0043, "theta": -0.0178, "rho": -0.0048, "theo": 10.828, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 10.5999999046326}, {"option": "BKF261218C00025000", "bid": 12.4, "bid_size": 200.0, "ask": 16.3, "ask_size": 200.0, "iv": 0.6257, "open_interest": 0.0, "volume": 0.0, "delta": 0.955, "gamma": 0.0083, "vega": 0.0124, "theta": -0.0134, "rho": 0.0214, "theo": 14.5659, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 14.5}, {"option": "BKF261218P00025000", "bid": 0.0, "bid_size": 0.0, "ask": 1.9, "ask_size": 192.0, "iv": 1.2943, "open_interest": 0.0, "volume": 0.0, "delta": -0.054, "gamma": 0.0092, "vega": 0.0138, "theta": -0.0166, "rho": -0.0025, "theo": 0.2985, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.975000023841858}, {"option": "BKF261218C00030000", "bid": 7.6, "bid_size": 320.0, "ask": 11.3, "ask_size": 320.0, "iv": 0.515, "open_interest": 0.0, "volume": 0.0, "delta": 0.9238, "gamma": 0.0179, "vega": 0.0186, "theta": -0.0147, "rho": 0.0249, "theo": 9.6459, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.54999995231628}, {"option": "BKF261218P00030000", "bid": 0.0, "bid_size": 0.0, "ask": 1.9, "ask_size": 192.0, "iv": 0.8864, "open_interest": 0.0, "volume": 0.0, "delta": -0.0907, "gamma": 0.0198, "vega": 0.0206, "theta": -0.0174, "rho": -0.004, "theo": 0.3732, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.975000023841858}, {"option": "BKF261218C00034000", "bid": 3.6, "bid_size": 320.0, "ask": 7.4, "ask_size": 320.0, "iv": 0.3346, "open_interest": 0.0, "volume": 0.0, "delta": 0.867, "gamma": 0.039, "vega": 0.0269, "theta": -0.0158, "rho": 0.0266, "theo": 5.7575, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 5.54999995231628}, {"option": "BKF261218P00034000", "bid": 0.0, "bid_size": 0.0, "ask": 1.9, "ask_size": 320.0, "iv": 0.588, "open_interest": 0.0, "volume": 0.0, "delta": -0.1573, "gamma": 0.0423, "vega": 0.0304, "theta": -0.0177, "rho": -0.0067, "theo": 0.4948, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.0}, {"option": "BKF261218C00035000", "bid": 2.6, "bid_size": 320.0, "ask": 6.3, "ask_size": 245.0, "iv": 0.25, "open_interest": 0.0, "volume": 0.0, "delta": 0.8414, "gamma": 0.0492, "vega": 0.0306, "theta": -0.016, "rho": 0.0268, "theo": 4.802, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.57499992847443}, {"option": "BKF261218P00035000", "bid": 0.0, "bid_size": 0.0, "ask": 1.95, "ask_size": 320.0, "iv": 0.5207, "open_interest": 0.0, "volume": 0.0, "delta": -0.1873, "gamma": 0.0529, "vega": 0.0341, "theta": -0.0178, "rho": -0.008, "theo": 0.549, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.02499997615814}, {"option": "BKF261218C00036000", "bid": 1.6, "bid_size": 303.0, "ask": 5.4, "ask_size": 320.0, "iv": 0.2273, "open_interest": 1.0, "volume": 0.0, "delta": 0.8054, "gamma": 0.0631, "vega": 0.0339, "theta": -0.0163, "rho": 0.0262, "theo": 3.8687, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 5.2, "last_trade_time": "2026-06-18T09:30:01", "percent_change": 0.0, "prev_day_close": 3.67499989271164}, {"option": "BKF261218P00036000", "bid": 0.0, "bid_size": 0.0, "ask": 2.05, "ask_size": 320.0, "iv": 0.4575, "open_interest": 0.0, "volume": 0.0, "delta": -0.2285, "gamma": 0.0672, "vega": 0.0382, "theta": -0.0178, "rho": -0.0096, "theo": 0.6265, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.04999995231628}, {"option": "BKF261218C00037000", "bid": 0.6, "bid_size": 266.0, "ask": 4.7, "ask_size": 320.0, "iv": 0.2268, "open_interest": 1.0, "volume": 0.0, "delta": 0.753, "gamma": 0.082, "vega": 0.0393, "theta": -0.0167, "rho": 0.025, "theo": 2.9709, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 4.6, "last_trade_time": "2026-06-18T09:30:01", "percent_change": 0.0, "prev_day_close": 2.7250000834465}, {"option": "BKF261218P00037000", "bid": 0.0, "bid_size": 0.0, "ask": 2.15, "ask_size": 316.0, "iv": 0.3904, "open_interest": 0.0, "volume": 0.0, "delta": -0.2874, "gamma": 0.0857, "vega": 0.0429, "theta": -0.0177, "rho": -0.012, "theo": 0.748, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.125}, {"option": "BKF261218C00038000", "bid": 0.0, "bid_size": 0.0, "ask": 3.8, "ask_size": 303.0, "iv": 0.2251, "open_interest": 2.0, "volume": 0.0, "delta": 0.6737, "gamma": 0.1043, "vega": 0.0444, "theta": -0.0173, "rho": 0.0231, "theo": 2.1557, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 3.9, "last_trade_time": "2026-07-20T09:30:01", "percent_change": 0.0, "prev_day_close": 1.95000004768372}, {"option": "BKF261218P00038000", "bid": 0.0, "bid_size": 0.0, "ask": 2.4, "ask_size": 293.0, "iv": 0.333, "open_interest": 4.0, "volume": 0.0, "delta": -0.3727, "gamma": 0.1061, "vega": 0.0476, "theta": -0.0177, "rho": -0.0155, "theo": 0.9633, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 1.8, "last_trade_time": "2026-07-06T09:30:02", "percent_change": 0.0, "prev_day_close": 1.0}, {"option": "BKF261218C00039000", "bid": 0.0, "bid_size": 0.0, "ask": 2.9, "ask_size": 282.0, "iv": 0.2583, "open_interest": 2.0, "volume": 0.0, "delta": 0.5634, "gamma": 0.1189, "vega": 0.0491, "theta": -0.0182, "rho": 0.0193, "theo": 1.5155, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 2.6, "last_trade_time": "2026-08-14T09:30:03", "percent_change": 0.0, "prev_day_close": 1.32500004768372}, {"option": "BKF261218P00039000", "bid": 0.0, "bid_size": 0.0, "ask": 2.8, "ask_size": 283.0, "iv": 0.2786, "open_interest": 1.0, "volume": 0.0, "delta": -0.4837, "gamma": 0.1166, "vega": 0.0501, "theta": -0.0178, "rho": -0.0201, "theo": 1.365, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 1.9, "last_trade_time": "2026-06-16T09:30:30", "percent_change": 0.0, "prev_day_close": 1.22500002384186}, {"option": "BKF261218C00040000", "bid": 0.0, "bid_size": 0.0, "ask": 2.4, "ask_size": 285.0, "iv": 0.3025, "open_interest": 1.0, "volume": 0.0, "delta": 0.4492, "gamma": 0.1133, "vega": 0.0492, "theta": -0.0192, "rho": 0.0161, "theo": 1.1163, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 1.95, "last_trade_time": "2026-08-25T09:30:03", "percent_change": 0.0, "prev_day_close": 1.02499997615814}, {"option": "BKF261218P00040000", "bid": 0.0, "bid_size": 0.0, "ask": 3.5, "ask_size": 286.0, "iv": 0.2326, "open_interest": 0.0, "volume": 0.0, "delta": -0.5908, "gamma": 0.1082, "vega": 0.0489, "theta": -0.0182, "rho": -0.0248, "theo": 2.0057, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.79999995231628}, {"option": "BKF261218C00041000", "bid": 0.0, "bid_size": 0.0, "ask": 2.05, "ask_size": 297.0, "iv": 0.343, "open_interest": 0.0, "volume": 0.0, "delta": 0.3605, "gamma": 0.097, "vega": 0.0464, "theta": -0.0199, "rho": 0.0126, "theo": 0.8915, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.850000023841858}, {"option": "BKF261218P00041000", "bid": 0.2, "bid_size": 245.0, "ask": 4.3, "ask_size": 41.0, "iv": 0.18, "open_interest": 3.0, "volume": 0.0, "delta": -0.6705, "gamma": 0.0915, "vega": 0.0457, "theta": -0.0185, "rho": -0.0286, "theo": 2.8083, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 1.75, "last_trade_time": "2026-08-20T09:30:03", "percent_change": 0.0, "prev_day_close": 2.25000004842877}, {"option": "BKF261218C00042000", "bid": 0.0, "bid_size": 0.0, "ask": 1.9, "ask_size": 320.0, "iv": 0.3926, "open_interest": 0.0, "volume": 0.0, "delta": 0.2976, "gamma": 0.0807, "vega": 0.043, "theta": -0.0203, "rho": 0.0105, "theo": 0.7557, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.975000023841858}, {"option": "BKF261218P00042000", "bid": 1.1, "bid_size": 245.0, "ask": 5.2, "ask_size": 41.0, "iv": 0.1965, "open_interest": 28.0, "volume": 0.0, "delta": -0.7261, "gamma": 0.076, "vega": 0.042, "theta": -0.0188, "rho": -0.0315, "theo": 3.6892, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 2.4, "last_trade_time": "2026-08-14T09:30:03", "percent_change": 0.0, "prev_day_close": 3.12500008940697}, {"option": "BKF261218C00043000", "bid": 0.0, "bid_size": 0.0, "ask": 1.8, "ask_size": 320.0, "iv": 0.4398, "open_interest": 0.0, "volume": 0.0, "delta": 0.2524, "gamma": 0.0675, "vega": 0.0396, "theta": -0.0204, "rho": 0.0089, "theo": 0.6642, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.949999988079071}, {"option": "BKF261218P00043000", "bid": 2.0, "bid_size": 245.0, "ask": 6.1, "ask_size": 41.0, "iv": 0.1879, "open_interest": 3.0, "volume": 0.0, "delta": -0.7659, "gamma": 0.0637, "vega": 0.0387, "theta": -0.0188, "rho": -0.0339, "theo": 4.608, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 3.1, "last_trade_time": "2026-08-20T09:30:03", "percent_change": 0.0, "prev_day_close": 3.99999994039536}, {"option": "BKF261218C00044000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 320.0, "iv": 0.4876, "open_interest": 0.0, "volume": 0.0, "delta": 0.2187, "gamma": 0.0572, "vega": 0.0375, "theta": -0.0204, "rho": 0.008, "theo": 0.5977, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.925000011920929}, {"option": "BKF261218P00044000", "bid": 2.9, "bid_size": 320.0, "ask": 7.1, "ask_size": 41.0, "iv": 0.1664, "open_interest": 0.0, "volume": 0.0, "delta": -0.7956, "gamma": 0.0542, "vega": 0.0359, "theta": -0.0188, "rho": -0.0359, "theo": 5.5476, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.94999992847443}, {"option": "BKF261218C00045000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 320.0, "iv": 0.538, "open_interest": 0.0, "volume": 0.0, "delta": 0.1932, "gamma": 0.0492, "vega": 0.0344, "theta": -0.0204, "rho": 0.0069, "theo": 0.548, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.925000011920929}, {"option": "BKF261218P00045000", "bid": 3.9, "bid_size": 320.0, "ask": 8.1, "ask_size": 41.0, "iv": 0.2029, "open_interest": 1.0, "volume": 0.0, "delta": -0.8186, "gamma": 0.0467, "vega": 0.0332, "theta": -0.0187, "rho": -0.0376, "theo": 6.5, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 4.6, "last_trade_time": "2026-08-12T09:30:03", "percent_change": 0.0, "prev_day_close": 5.94999992847443}, {"option": "BKF261218C00046000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 320.0, "iv": 0.5853, "open_interest": 0.0, "volume": 0.0, "delta": 0.1726, "gamma": 0.0428, "vega": 0.0319, "theta": -0.0202, "rho": 0.0061, "theo": 0.5064, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00046000", "bid": 5.0, "bid_size": 245.0, "ask": 9.1, "ask_size": 41.0, "iv": 0.2961, "open_interest": 0.0, "volume": 0.0, "delta": -0.8369, "gamma": 0.0408, "vega": 0.0312, "theta": -0.0186, "rho": -0.0392, "theo": 7.4604, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.94999980926514}, {"option": "BKF261218C00047000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 320.0, "iv": 0.63, "open_interest": 0.0, "volume": 0.0, "delta": 0.1562, "gamma": 0.0377, "vega": 0.03, "theta": -0.0201, "rho": 0.0056, "theo": 0.4736, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00047000", "bid": 6.0, "bid_size": 245.0, "ask": 10.1, "ask_size": 41.0, "iv": 0.3301, "open_interest": 1.0, "volume": 0.0, "delta": -0.8519, "gamma": 0.036, "vega": 0.0292, "theta": -0.0184, "rho": -0.0407, "theo": 8.4266, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 6.2, "last_trade_time": "2026-07-31T09:30:05", "percent_change": 0.0, "prev_day_close": 7.84999990463257}, {"option": "BKF261218C00048000", "bid": 0.0, "bid_size": 0.0, "ask": 0.25, "ask_size": 1.0, "iv": 0.3941, "open_interest": 1.0, "volume": 0.0, "delta": 0.1422, "gamma": 0.0334, "vega": 0.0287, "theta": -0.0199, "rho": 0.0052, "theo": 0.444, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 0.3, "last_trade_time": "2026-07-17T09:31:49", "percent_change": 0.0, "prev_day_close": 0.150000005960464}, {"option": "BKF261218P00048000", "bid": 7.0, "bid_size": 238.0, "ask": 11.1, "ask_size": 41.0, "iv": 0.3633, "open_interest": 0.0, "volume": 0.0, "delta": -0.8643, "gamma": 0.0321, "vega": 0.0274, "theta": -0.0182, "rho": -0.042, "theo": 9.3974, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 8.84999990463257}, {"option": "BKF261218C00049000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 320.0, "iv": 0.7136, "open_interest": 0.0, "volume": 0.0, "delta": 0.131, "gamma": 0.03, "vega": 0.0266, "theta": -0.0197, "rho": 0.0047, "theo": 0.4206, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00049000", "bid": 8.0, "bid_size": 245.0, "ask": 12.1, "ask_size": 41.0, "iv": 0.3957, "open_interest": 0.0, "volume": 0.0, "delta": -0.8749, "gamma": 0.0289, "vega": 0.0261, "theta": -0.0179, "rho": -0.0434, "theo": 10.3712, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.84999990463257}, {"option": "BKF261218C00050000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 192.0, "iv": 0.7525, "open_interest": 0.0, "volume": 0.0, "delta": 0.1212, "gamma": 0.0272, "vega": 0.0254, "theta": -0.0195, "rho": 0.0044, "theo": 0.3992, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00050000", "bid": 9.0, "bid_size": 245.0, "ask": 13.1, "ask_size": 41.0, "iv": 0.4273, "open_interest": 0.0, "volume": 0.0, "delta": -0.884, "gamma": 0.0262, "vega": 0.0247, "theta": -0.0177, "rho": -0.0446, "theo": 11.3475, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 10.9000000953674}, {"option": "BKF261218C00051000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 192.0, "iv": 0.7901, "open_interest": 0.0, "volume": 0.0, "delta": 0.1126, "gamma": 0.0247, "vega": 0.0242, "theta": -0.0192, "rho": 0.004, "theo": 0.3797, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00051000", "bid": 10.0, "bid_size": 320.0, "ask": 14.1, "ask_size": 41.0, "iv": 0.4583, "open_interest": 0.0, "volume": 0.0, "delta": -0.8918, "gamma": 0.0239, "vega": 0.0235, "theta": -0.0174, "rho": -0.0458, "theo": 12.326, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 8.38, "last_trade_time": "2026-05-08T13:27:55", "percent_change": 0.0, "prev_day_close": 11.8499999046326}, {"option": "BKF261218C00052000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 192.0, "iv": 0.8264, "open_interest": 0.0, "volume": 0.0, "delta": 0.1054, "gamma": 0.0226, "vega": 0.0228, "theta": -0.019, "rho": 0.0038, "theo": 0.3633, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00052000", "bid": 10.8, "bid_size": 320.0, "ask": 15.1, "ask_size": 41.0, "iv": 0.0, "open_interest": 0.0, "volume": 0.0, "delta": -0.8987, "gamma": 0.0219, "vega": 0.0223, "theta": -0.0171, "rho": -0.047, "theo": 13.3064, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 9.31, "last_trade_time": "2026-05-08T13:25:51", "percent_change": 0.0, "prev_day_close": 12.8499999046326}, {"option": "BKF261218C00055000", "bid": 0.0, "bid_size": 0.0, "ask": 1.75, "ask_size": 192.0, "iv": 0.9276, "open_interest": 0.0, "volume": 0.0, "delta": 0.0879, "gamma": 0.0178, "vega": 0.0199, "theta": -0.0183, "rho": 0.0032, "theo": 0.3211, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.899999976158142}, {"option": "BKF261218P00055000", "bid": 13.8, "bid_size": 320.0, "ask": 18.1, "ask_size": 41.0, "iv": 0.3992, "open_interest": 0.0, "volume": 0.0, "delta": -0.915, "gamma": 0.0174, "vega": 0.0196, "theta": -0.0162, "rho": -0.0504, "theo": 16.2546, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 15.8499999046326}, {"option": "BKF270319C00025000", "bid": 12.0, "bid_size": 321.0, "ask": 17.0, "ask_size": 80.0, "iv": 0.5216, "open_interest": 0.0, "volume": 0.0, "delta": 0.9202, "gamma": 0.011, "vega": 0.0339, "theta": -0.0074, "rho": 0.0577, "theo": 14.8139, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 14.6500000953674}, {"option": "BKF270319P00025000", "bid": 0.0, "bid_size": 0.0, "ask": 2.8, "ask_size": 51.0, "iv": 0.8185, "open_interest": 0.0, "volume": 0.0, "delta": -0.0834, "gamma": 0.0104, "vega": 0.0356, "theta": -0.0086, "rho": -0.0127, "theo": 0.6502, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.42499995231628}, {"option": "BKF270319C00030000", "bid": 7.0, "bid_size": 321.0, "ask": 12.0, "ask_size": 80.0, "iv": 0.3277, "open_interest": 0.0, "volume": 0.0, "delta": 0.8693, "gamma": 0.0205, "vega": 0.0486, "theta": -0.0079, "rho": 0.0746, "theo": 10.0256, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.59999990463257}, {"option": "BKF270319P00030000", "bid": 0.0, "bid_size": 0.0, "ask": 2.85, "ask_size": 51.0, "iv": 0.5794, "open_interest": 0.0, "volume": 0.0, "delta": -0.1325, "gamma": 0.02, "vega": 0.0497, "theta": -0.0088, "rho": -0.019, "theo": 0.8, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.45000004768372}, {"option": "BKF270319C00031000", "bid": 6.1, "bid_size": 2.0, "ask": 11.0, "ask_size": 81.0, "iv": 0.3093, "open_interest": 0.0, "volume": 0.0, "delta": 0.8543, "gamma": 0.0234, "vega": 0.0524, "theta": -0.008, "rho": 0.0772, "theo": 9.0825, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 8.65000009536743}, {"option": "BKF270319P00031000", "bid": 0.0, "bid_size": 0.0, "ask": 2.9, "ask_size": 80.0, "iv": 0.5381, "open_interest": 0.0, "volume": 0.0, "delta": -0.1472, "gamma": 0.0231, "vega": 0.0535, "theta": -0.0088, "rho": -0.021, "theo": 0.844, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.47500002384186}, {"option": "BKF270319C00032000", "bid": 5.1, "bid_size": 2.0, "ask": 10.0, "ask_size": 81.0, "iv": 0.2741, "open_interest": 0.0, "volume": 0.0, "delta": 0.8368, "gamma": 0.0269, "vega": 0.0567, "theta": -0.008, "rho": 0.081, "theo": 8.1485, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 7.59999990463257}, {"option": "BKF270319P00032000", "bid": 0.0, "bid_size": 0.0, "ask": 2.95, "ask_size": 80.0, "iv": 0.4971, "open_interest": 0.0, "volume": 0.0, "delta": -0.1645, "gamma": 0.0268, "vega": 0.0574, "theta": -0.0088, "rho": -0.0231, "theo": 0.8965, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.47500002384186}, {"option": "BKF270319C00033000", "bid": 4.1, "bid_size": 2.0, "ask": 9.0, "ask_size": 80.0, "iv": 0.2399, "open_interest": 0.0, "volume": 0.0, "delta": 0.8161, "gamma": 0.0311, "vega": 0.0611, "theta": -0.0081, "rho": 0.0823, "theo": 7.2255, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.59999990463257}, {"option": "BKF270319P00033000", "bid": 0.0, "bid_size": 0.0, "ask": 3.0, "ask_size": 80.0, "iv": 0.4563, "open_interest": 0.0, "volume": 0.0, "delta": -0.1852, "gamma": 0.0312, "vega": 0.0619, "theta": -0.0089, "rho": -0.0256, "theo": 0.9601, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.54999995231628}, {"option": "BKF270319C00034000", "bid": 3.4, "bid_size": 1.0, "ask": 8.0, "ask_size": 1.0, "iv": 0.2398, "open_interest": 0.0, "volume": 0.0, "delta": 0.7912, "gamma": 0.036, "vega": 0.0662, "theta": -0.0081, "rho": 0.0841, "theo": 6.3184, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 5.64999997615814}, {"option": "BKF270319P00034000", "bid": 0.0, "bid_size": 0.0, "ask": 3.1, "ask_size": 80.0, "iv": 0.419, "open_interest": 0.0, "volume": 0.0, "delta": -0.2104, "gamma": 0.0365, "vega": 0.0668, "theta": -0.0089, "rho": -0.0286, "theo": 1.0396, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.54999995231628}, {"option": "BKF270319C00035000", "bid": 2.4, "bid_size": 1.0, "ask": 7.0, "ask_size": 1.0, "iv": 0.2039, "open_interest": 0.0, "volume": 0.0, "delta": 0.7608, "gamma": 0.042, "vega": 0.0715, "theta": -0.0082, "rho": 0.0848, "theo": 5.434, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.95000004768372}, {"option": "BKF270319P00035000", "bid": 0.0, "bid_size": 0.0, "ask": 3.2, "ask_size": 80.0, "iv": 0.3809, "open_interest": 0.0, "volume": 0.0, "delta": -0.2416, "gamma": 0.0428, "vega": 0.0721, "theta": -0.0089, "rho": -0.0322, "theo": 1.1423, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.60000002384186}, {"option": "BKF270319C00036000", "bid": 1.5, "bid_size": 296.0, "ask": 6.4, "ask_size": 1.0, "iv": 0.2077, "open_interest": 0.0, "volume": 0.0, "delta": 0.7232, "gamma": 0.0488, "vega": 0.0772, "theta": -0.0083, "rho": 0.0834, "theo": 4.5839, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.05000001192093}, {"option": "BKF270319P00036000", "bid": 0.0, "bid_size": 0.0, "ask": 3.4, "ask_size": 80.0, "iv": 0.348, "open_interest": 0.0, "volume": 0.0, "delta": -0.2804, "gamma": 0.0502, "vega": 0.0777, "theta": -0.0089, "rho": -0.0364, "theo": 1.2807, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.70000004768372}, {"option": "BKF270319C00037000", "bid": 0.6, "bid_size": 363.0, "ask": 5.5, "ask_size": 138.0, "iv": 0.1815, "open_interest": 0.0, "volume": 0.0, "delta": 0.6765, "gamma": 0.0563, "vega": 0.0828, "theta": -0.0083, "rho": 0.0802, "theo": 3.788, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 3.05000001192093}, {"option": "BKF270319P00037000", "bid": 0.0, "bid_size": 0.0, "ask": 3.5, "ask_size": 138.0, "iv": 0.307, "open_interest": 0.0, "volume": 0.0, "delta": -0.3292, "gamma": 0.0584, "vega": 0.0834, "theta": -0.0089, "rho": -0.0416, "theo": 1.4749, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.79999995231628}, {"option": "BKF270319C00038000", "bid": 0.1, "bid_size": 464.0, "ask": 5.0, "ask_size": 139.0, "iv": 0.1982, "open_interest": 0.0, "volume": 0.0, "delta": 0.6196, "gamma": 0.0632, "vega": 0.0877, "theta": -0.0084, "rho": 0.0749, "theo": 3.0766, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270319P00038000", "bid": 0.0, "bid_size": 0.0, "ask": 3.8, "ask_size": 143.0, "iv": 0.275, "open_interest": 1.0, "volume": 1.0, "delta": -0.3892, "gamma": 0.0662, "vega": 0.0881, "theta": -0.009, "rho": -0.0476, "theo": 1.7568, "change": -1.0, "open": 0.95, "high": 0.95, "low": 0.95, "tick": "down", "last_trade_price": 0.95, "last_trade_time": "2026-11-10T09:30:02", "percent_change": -51.2821, "prev_day_close": 1.95000004768372}, {"option": "BKF270319C00039000", "bid": 0.0, "bid_size": 0.0, "ask": 4.6, "ask_size": 139.0, "iv": 0.2305, "open_interest": 6.0, "volume": 0.0, "delta": 0.5544, "gamma": 0.0677, "vega": 0.091, "theta": -0.0086, "rho": 0.068, "theo": 2.487, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 2.15, "last_trade_time": "2026-11-04T12:23:49", "percent_change": 0.0, "prev_day_close": 2.34999990463257}, {"option": "BKF270319P00039000", "bid": 0.0, "bid_size": 0.0, "ask": 4.2, "ask_size": 126.0, "iv": 0.2439, "open_interest": 0.0, "volume": 1.0, "delta": -0.4582, "gamma": 0.0716, "vega": 0.0908, "theta": -0.0091, "rho": -0.0538, "theo": 2.1647, "change": -0.85, "open": 1.3, "high": 1.3, "low": 1.3, "tick": "down", "last_trade_price": 1.3, "last_trade_time": "2026-11-10T09:30:02", "percent_change": -39.5349, "prev_day_close": 2.15000009536743}, {"option": "BKF270319C00040000", "bid": 0.0, "bid_size": 0.0, "ask": 4.0, "ask_size": 139.0, "iv": 0.2475, "open_interest": 0.0, "volume": 0.0, "delta": 0.4879, "gamma": 0.068, "vega": 0.0919, "theta": -0.0087, "rho": 0.0603, "theo": 2.0415, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.04999995231628}, {"option": "BKF270319P00040000", "bid": 0.0, "bid_size": 0.0, "ask": 4.8, "ask_size": 139.0, "iv": 0.2166, "open_interest": 1.0, "volume": 0.0, "delta": -0.5288, "gamma": 0.0725, "vega": 0.0908, "theta": -0.0093, "rho": -0.0593, "theo": 2.7208, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 2.0, "last_trade_time": "2026-10-21T09:30:02", "percent_change": 0.0, "prev_day_close": 2.45000004768372}, {"option": "BKF270319C00041000", "bid": 0.0, "bid_size": 0.0, "ask": 3.6, "ask_size": 80.0, "iv": 0.2685, "open_interest": 0.0, "volume": 0.0, "delta": 0.4277, "gamma": 0.0648, "vega": 0.0905, "theta": -0.0089, "rho": 0.053, "theo": 1.7267, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.85000002384186}, {"option": "BKF270319P00041000", "bid": 0.1, "bid_size": 2.0, "ask": 5.0, "ask_size": 81.0, "iv": 0.1585, "open_interest": 1.0, "volume": 0.0, "delta": -0.5924, "gamma": 0.0695, "vega": 0.0886, "theta": -0.0094, "rho": -0.0637, "theo": 3.4098, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 1.7, "last_trade_time": "2026-08-21T09:30:03", "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270319C00042000", "bid": 0.0, "bid_size": 0.0, "ask": 3.3, "ask_size": 80.0, "iv": 0.2897, "open_interest": 0.0, "volume": 0.0, "delta": 0.3772, "gamma": 0.0598, "vega": 0.0877, "theta": -0.0091, "rho": 0.0468, "theo": 1.5068, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.70000004768372}, {"option": "BKF270319P00042000", "bid": 1.1, "bid_size": 1.0, "ask": 5.5, "ask_size": 1.0, "iv": 0.1554, "open_interest": 1.0, "volume": 0.0, "delta": -0.6454, "gamma": 0.0642, "vega": 0.0848, "theta": -0.0095, "rho": -0.0678, "theo": 4.1947, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 3.8, "last_trade_time": "2026-07-23T09:30:03", "percent_change": 0.0, "prev_day_close": 3.15000000596046}, {"option": "BKF270319C00043000", "bid": 0.15, "bid_size": 1.0, "ask": 0.75, "ask_size": 1.0, "iv": 0.1724, "open_interest": 2.0, "volume": 0.0, "delta": 0.3361, "gamma": 0.0543, "vega": 0.0844, "theta": -0.0092, "rho": 0.0416, "theo": 1.3486, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 2.05, "last_trade_time": "2026-07-29T09:30:00", "percent_change": 0.0, "prev_day_close": 0.475000008940697}, {"option": "BKF270319P00043000", "bid": 2.0, "bid_size": 1.0, "ask": 6.5, "ask_size": 1.0, "iv": 0.1748, "open_interest": 0.0, "volume": 0.0, "delta": -0.688, "gamma": 0.0584, "vega": 0.0802, "theta": -0.0095, "rho": -0.07, "theo": 5.0407, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.10000002384186}, {"option": "BKF270319C00044000", "bid": 0.0, "bid_size": 0.0, "ask": 2.9, "ask_size": 80.0, "iv": 0.3322, "open_interest": 1.0, "volume": 0.0, "delta": 0.3028, "gamma": 0.0492, "vega": 0.0808, "theta": -0.0094, "rho": 0.0374, "theo": 1.23, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 2.0, "last_trade_time": "2026-07-16T09:30:06", "percent_change": 0.0, "prev_day_close": 1.5}, {"option": "BKF270319P00044000", "bid": 3.2, "bid_size": 1.0, "ask": 7.5, "ask_size": 1.0, "iv": 0.2198, "open_interest": 1.0, "volume": 0.0, "delta": -0.7223, "gamma": 0.0528, "vega": 0.0763, "theta": -0.0095, "rho": -0.0724, "theo": 5.9256, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 5.1, "last_trade_time": "2026-07-23T09:30:03", "percent_change": 0.0, "prev_day_close": 5.04999995231628}, {"option": "BKF270319C00045000", "bid": 0.0, "bid_size": 0.0, "ask": 2.8, "ask_size": 80.0, "iv": 0.3554, "open_interest": 0.0, "volume": 0.0, "delta": 0.2754, "gamma": 0.0446, "vega": 0.0774, "theta": -0.0094, "rho": 0.0339, "theo": 1.1372, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.45000004768372}, {"option": "BKF270319P00045000", "bid": 3.5, "bid_size": 321.0, "ask": 8.5, "ask_size": 39.0, "iv": 0.0, "open_interest": 1.0, "volume": 0.0, "delta": -0.7502, "gamma": 0.0478, "vega": 0.0721, "theta": -0.0095, "rho": -0.0734, "theo": 6.8353, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 4.8, "last_trade_time": "2026-08-13T09:30:02", "percent_change": 0.0, "prev_day_close": 6.04999995231628}, {"option": "BKF270319C00046000", "bid": 0.0, "bid_size": 0.0, "ask": 2.75, "ask_size": 80.0, "iv": 0.3797, "open_interest": 0.0, "volume": 0.0, "delta": 0.2527, "gamma": 0.0406, "vega": 0.074, "theta": -0.0095, "rho": 0.031, "theo": 1.0622, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.42499995231628}, {"option": "BKF270319P00046000", "bid": 4.9, "bid_size": 1.0, "ask": 9.5, "ask_size": 2.0, "iv": 0.2376, "open_interest": 1.0, "volume": 0.0, "delta": -0.7732, "gamma": 0.0434, "vega": 0.0681, "theta": -0.0094, "rho": -0.0752, "theo": 7.7628, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 5.5, "last_trade_time": "2026-08-12T09:30:03", "percent_change": 0.0, "prev_day_close": 7.04999995231628}, {"option": "BKF270319C00047000", "bid": 0.0, "bid_size": 0.0, "ask": 2.75, "ask_size": 80.0, "iv": 0.4058, "open_interest": 0.0, "volume": 0.0, "delta": 0.2335, "gamma": 0.0371, "vega": 0.071, "theta": -0.0095, "rho": 0.0286, "theo": 0.9998, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.39999997615814}, {"option": "BKF270319P00047000", "bid": 5.9, "bid_size": 1.0, "ask": 10.5, "ask_size": 1.0, "iv": 0.2597, "open_interest": 0.0, "volume": 0.0, "delta": -0.7925, "gamma": 0.0396, "vega": 0.065, "theta": -0.0093, "rho": -0.0767, "theo": 8.7017, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 7.84999990463257}, {"option": "BKF270319C00048000", "bid": 0.0, "bid_size": 0.0, "ask": 2.7, "ask_size": 80.0, "iv": 0.4272, "open_interest": 0.0, "volume": 0.0, "delta": 0.2172, "gamma": 0.0341, "vega": 0.0682, "theta": -0.0096, "rho": 0.0265, "theo": 0.9466, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.375}, {"option": "BKF270319P00048000", "bid": 6.9, "bid_size": 1.0, "ask": 11.5, "ask_size": 2.0, "iv": 0.2811, "open_interest": 1.0, "volume": 0.0, "delta": -0.8089, "gamma": 0.0362, "vega": 0.0617, "theta": -0.0092, "rho": -0.0772, "theo": 9.6494, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "up", "last_trade_price": 8.1, "last_trade_time": "2026-07-21T09:30:02", "percent_change": 0.0, "prev_day_close": 8.94999980926514}, {"option": "BKF270319C00049000", "bid": 0.0, "bid_size": 0.0, "ask": 2.7, "ask_size": 80.0, "iv": 0.4509, "open_interest": 0.0, "volume": 0.0, "delta": 0.203, "gamma": 0.0315, "vega": 0.0655, "theta": -0.0096, "rho": 0.0247, "theo": 0.9007, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.375}, {"option": "BKF270319P00049000", "bid": 7.8, "bid_size": 1.0, "ask": 12.5, "ask_size": 1.0, "iv": 0.287, "open_interest": 0.0, "volume": 0.0, "delta": -0.823, "gamma": 0.0334, "vega": 0.0586, "theta": -0.009, "rho": -0.0768, "theo": 10.604, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.94999980926514}, {"option": "BKF270319C00050000", "bid": 0.0, "bid_size": 0.0, "ask": 2.65, "ask_size": 83.0, "iv": 0.47, "open_interest": 0.0, "volume": 0.0, "delta": 0.1906, "gamma": 0.0292, "vega": 0.0631, "theta": -0.0096, "rho": 0.0231, "theo": 0.8603, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.375}, {"option": "BKF270319P00050000", "bid": 8.6, "bid_size": 320.0, "ask": 13.5, "ask_size": 39.0, "iv": 0.2667, "open_interest": 0.0, "volume": 0.0, "delta": -0.8353, "gamma": 0.0308, "vega": 0.0557, "theta": -0.0088, "rho": -0.0788, "theo": 11.5641, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 10.9499998092651}, {"option": "BKF270319C00055000", "bid": 0.0, "bid_size": 0.0, "ask": 2.65, "ask_size": 51.0, "iv": 0.5711, "open_interest": 0.0, "volume": 0.0, "delta": 0.1465, "gamma": 0.021, "vega": 0.0533, "theta": -0.0094, "rho": 0.0175, "theo": 0.7113, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 0.224999994039536}, {"option": "BKF270319P00055000", "bid": 13.8, "bid_size": 1.0, "ask": 18.5, "ask_size": 1.0, "iv": 0.3971, "open_interest": 0.0, "volume": 0.0, "delta": -0.8786, "gamma": 0.0218, "vega": 0.045, "theta": -0.0079, "rho": -0.0806, "theo": 16.412, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 15.8000001907349}, {"option": "BKF270617C00030000", "bid": 7.2, "bid_size": 1.0, "ask": 12.0, "ask_size": 1.0, "iv": 0.2772, "open_interest": 0.0, "volume": 0.0, "delta": 0.8488, "gamma": 0.0194, "vega": 0.068, "theta": -0.0043, "rho": 0.1293, "theo": 10.2475, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 10.0}, {"option": "BKF270617P00030000", "bid": 0.0, "bid_size": 0.0, "ask": 4.0, "ask_size": 51.0, "iv": 0.5223, "open_interest": 0.0, "volume": 0.0, "delta": -0.1466, "gamma": 0.0195, "vega": 0.0691, "theta": -0.006, "rho": -0.038, "theo": 1.0158, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.95000004768372}, {"option": "BKF270617C00031000", "bid": 6.5, "bid_size": 1.0, "ask": 11.3, "ask_size": 1.0, "iv": 0.3025, "open_interest": 0.0, "volume": 0.0, "delta": 0.8336, "gamma": 0.022, "vega": 0.0722, "theta": -0.0044, "rho": 0.1316, "theo": 9.3285, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.04999995231628}, {"option": "BKF270617P00031000", "bid": 0.0, "bid_size": 0.0, "ask": 4.0, "ask_size": 80.0, "iv": 0.4842, "open_interest": 0.0, "volume": 0.0, "delta": -0.162, "gamma": 0.0222, "vega": 0.0737, "theta": -0.006, "rho": -0.0415, "theo": 1.0712, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.0}, {"option": "BKF270617C00032000", "bid": 5.5, "bid_size": 321.0, "ask": 10.5, "ask_size": 81.0, "iv": 0.2854, "open_interest": 0.0, "volume": 0.0, "delta": 0.8161, "gamma": 0.025, "vega": 0.0763, "theta": -0.0046, "rho": 0.1345, "theo": 8.418, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 8.09999990463257}, {"option": "BKF270617P00032000", "bid": 0.0, "bid_size": 0.0, "ask": 4.1, "ask_size": 80.0, "iv": 0.4525, "open_interest": 0.0, "volume": 0.0, "delta": -0.1799, "gamma": 0.0254, "vega": 0.0788, "theta": -0.006, "rho": -0.0454, "theo": 1.1369, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.0}, {"option": "BKF270617C00033000", "bid": 4.5, "bid_size": 321.0, "ask": 9.5, "ask_size": 80.0, "iv": 0.253, "open_interest": 0.0, "volume": 0.0, "delta": 0.7956, "gamma": 0.0286, "vega": 0.0832, "theta": -0.0047, "rho": 0.1345, "theo": 7.5215, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 7.29999995231628}, {"option": "BKF270617P00033000", "bid": 0.0, "bid_size": 0.0, "ask": 4.2, "ask_size": 80.0, "iv": 0.4207, "open_interest": 0.0, "volume": 0.0, "delta": -0.2011, "gamma": 0.0292, "vega": 0.0843, "theta": -0.006, "rho": -0.0501, "theo": 1.2165, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.04999995231628}, {"option": "BKF270617C00034000", "bid": 3.7, "bid_size": 1.0, "ask": 8.5, "ask_size": 1.0, "iv": 0.2341, "open_interest": 0.0, "volume": 0.0, "delta": 0.7712, "gamma": 0.0328, "vega": 0.0882, "theta": -0.0049, "rho": 0.1346, "theo": 6.644, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.04999995231628}, {"option": "BKF270617P00034000", "bid": 0.0, "bid_size": 0.0, "ask": 4.3, "ask_size": 80.0, "iv": 0.3889, "open_interest": 0.0, "volume": 0.0, "delta": -0.2262, "gamma": 0.0336, "vega": 0.0901, "theta": -0.006, "rho": -0.0554, "theo": 1.3149, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.09999990463257}, {"option": "BKF270617C00035000", "bid": 2.9, "bid_size": 1.0, "ask": 7.5, "ask_size": 1.0, "iv": 0.2142, "open_interest": 0.0, "volume": 0.0, "delta": 0.7421, "gamma": 0.0376, "vega": 0.0953, "theta": -0.005, "rho": 0.1326, "theo": 5.7906, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 5.25}, {"option": "BKF270617P00035000", "bid": 0.0, "bid_size": 0.0, "ask": 4.4, "ask_size": 80.0, "iv": 0.3567, "open_interest": 0.0, "volume": 0.0, "delta": -0.2565, "gamma": 0.0386, "vega": 0.0964, "theta": -0.006, "rho": -0.0615, "theo": 1.4407, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.20000004768372}, {"option": "BKF270617C00036000", "bid": 2.4, "bid_size": 1.0, "ask": 7.0, "ask_size": 1.0, "iv": 0.2343, "open_interest": 0.0, "volume": 0.0, "delta": 0.7069, "gamma": 0.0429, "vega": 0.1009, "theta": -0.0052, "rho": 0.1301, "theo": 4.9774, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.45000004768372}, {"option": "BKF270617P00036000", "bid": 0.0, "bid_size": 0.0, "ask": 4.6, "ask_size": 80.0, "iv": 0.3286, "open_interest": 0.0, "volume": 0.0, "delta": -0.2932, "gamma": 0.0442, "vega": 0.1027, "theta": -0.006, "rho": -0.0686, "theo": 1.6058, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.25}, {"option": "BKF270617C00037000", "bid": 1.3, "bid_size": 1.0, "ask": 6.0, "ask_size": 1.0, "iv": 0.1933, "open_interest": 0.0, "volume": 0.0, "delta": 0.6647, "gamma": 0.0484, "vega": 0.1077, "theta": -0.0054, "rho": 0.1245, "theo": 4.2185, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 3.55000001192093}, {"option": "BKF270617P00037000", "bid": 0.0, "bid_size": 0.0, "ask": 4.8, "ask_size": 80.0, "iv": 0.2993, "open_interest": 0.0, "volume": 0.0, "delta": -0.3374, "gamma": 0.0502, "vega": 0.1088, "theta": -0.006, "rho": -0.0767, "theo": 1.8293, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.40000009536743}, {"option": "BKF270617C00038000", "bid": 0.6, "bid_size": 3.0, "ask": 5.5, "ask_size": 81.0, "iv": 0.1927, "open_interest": 0.0, "volume": 0.0, "delta": 0.6153, "gamma": 0.0532, "vega": 0.1132, "theta": -0.0055, "rho": 0.1173, "theo": 3.5392, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 3.05000001192093}, {"option": "BKF270617P00038000", "bid": 0.0, "bid_size": 0.0, "ask": 4.9, "ask_size": 1.0, "iv": 0.2639, "open_interest": 0.0, "volume": 0.0, "delta": -0.3894, "gamma": 0.0556, "vega": 0.1139, "theta": -0.006, "rho": -0.086, "theo": 2.1363, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270617C00039000", "bid": 0.1, "bid_size": 2.0, "ask": 5.0, "ask_size": 80.0, "iv": 0.195, "open_interest": 0.0, "volume": 0.0, "delta": 0.5607, "gamma": 0.0564, "vega": 0.1165, "theta": -0.0057, "rho": 0.1095, "theo": 2.968, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270617P00039000", "bid": 0.0, "bid_size": 0.0, "ask": 4.9, "ask_size": 1.0, "iv": 0.222, "open_interest": 0.0, "volume": 0.0, "delta": -0.4472, "gamma": 0.0596, "vega": 0.117, "theta": -0.0061, "rho": -0.0946, "theo": 2.5526, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270617C00040000", "bid": 0.1, "bid_size": 2.0, "ask": 5.0, "ask_size": 81.0, "iv": 0.2338, "open_interest": 0.0, "volume": 0.0, "delta": 0.505, "gamma": 0.0571, "vega": 0.1183, "theta": -0.0058, "rho": 0.0991, "theo": 2.5159, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270617P00040000", "bid": 0.1, "bid_size": 2.0, "ask": 5.0, "ask_size": 81.0, "iv": 0.1846, "open_interest": 0.0, "volume": 0.0, "delta": -0.5065, "gamma": 0.0612, "vega": 0.1177, "theta": -0.0062, "rho": -0.103, "theo": 3.0927, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270617C00041000", "bid": 0.05, "bid_size": 1.0, "ask": 5.0, "ask_size": 85.0, "iv": 0.2656, "open_interest": 0.0, "volume": 0.0, "delta": 0.453, "gamma": 0.0556, "vega": 0.1177, "theta": -0.006, "rho": 0.0891, "theo": 2.1745, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.55000000074506}, {"option": "BKF270617P00041000", "bid": 0.1, "bid_size": 2.0, "ask": 5.0, "ask_size": 41.0, "iv": 0.1276, "open_interest": 0.0, "volume": 0.0, "delta": -0.5621, "gamma": 0.0603, "vega": 0.116, "theta": -0.0063, "rho": -0.1088, "theo": 3.7469, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.70000000298023}, {"option": "BKF270617C00042000", "bid": 0.0, "bid_size": 0.0, "ask": 4.6, "ask_size": 80.0, "iv": 0.277, "open_interest": 0.0, "volume": 0.0, "delta": 0.4073, "gamma": 0.0526, "vega": 0.1154, "theta": -0.0061, "rho": 0.0803, "theo": 1.9204, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.40000009536743}, {"option": "BKF270617P00042000", "bid": 1.3, "bid_size": 1.0, "ask": 6.0, "ask_size": 1.0, "iv": 0.1652, "open_interest": 0.0, "volume": 0.0, "delta": -0.611, "gamma": 0.0578, "vega": 0.1123, "theta": -0.0063, "rho": -0.1137, "theo": 4.491, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 3.15000000596046}, {"option": "BKF270617C00043000", "bid": 0.0, "bid_size": 0.0, "ask": 4.3, "ask_size": 80.0, "iv": 0.2917, "open_interest": 0.0, "volume": 0.0, "delta": 0.3686, "gamma": 0.049, "vega": 0.1126, "theta": -0.0062, "rho": 0.0732, "theo": 1.7309, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.25}, {"option": "BKF270617P00043000", "bid": 2.1, "bid_size": 1.0, "ask": 6.5, "ask_size": 1.0, "iv": 0.1487, "open_interest": 0.0, "volume": 0.0, "delta": -0.6526, "gamma": 0.0544, "vega": 0.108, "theta": -0.0064, "rho": -0.1168, "theo": 5.2988, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 4.05000001192093}, {"option": "BKF270617C00044000", "bid": 0.0, "bid_size": 0.0, "ask": 4.1, "ask_size": 80.0, "iv": 0.3085, "open_interest": 0.0, "volume": 0.0, "delta": 0.336, "gamma": 0.0454, "vega": 0.1087, "theta": -0.0064, "rho": 0.0664, "theo": 1.5838, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.04999995231628}, {"option": "BKF270617P00044000", "bid": 3.0, "bid_size": 1.0, "ask": 7.5, "ask_size": 1.0, "iv": 0.1624, "open_interest": 0.0, "volume": 0.0, "delta": -0.6876, "gamma": 0.0507, "vega": 0.1032, "theta": -0.0063, "rho": -0.1187, "theo": 6.1505, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 5.04999995231628}, {"option": "BKF270617C00045000", "bid": 0.0, "bid_size": 0.0, "ask": 4.0, "ask_size": 80.0, "iv": 0.3278, "open_interest": 0.0, "volume": 0.0, "delta": 0.3086, "gamma": 0.0419, "vega": 0.1055, "theta": -0.0064, "rho": 0.0612, "theo": 1.4672, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.04999995231628}, {"option": "BKF270617P00045000", "bid": 4.0, "bid_size": 1.0, "ask": 8.5, "ask_size": 1.0, "iv": 0.1824, "open_interest": 0.0, "volume": 0.0, "delta": -0.7171, "gamma": 0.0471, "vega": 0.0984, "theta": -0.0063, "rho": -0.1197, "theo": 7.0323, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 6.04999995231628}, {"option": "BKF270617C00046000", "bid": 0.0, "bid_size": 0.0, "ask": 3.8, "ask_size": 80.0, "iv": 0.341, "open_interest": 0.0, "volume": 0.0, "delta": 0.2853, "gamma": 0.0387, "vega": 0.1014, "theta": -0.0065, "rho": 0.0562, "theo": 1.3717, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 2.0}, {"option": "BKF270617P00046000", "bid": 4.9, "bid_size": 1.0, "ask": 9.5, "ask_size": 1.0, "iv": 0.1918, "open_interest": 0.0, "volume": 0.0, "delta": -0.7421, "gamma": 0.0438, "vega": 0.0938, "theta": -0.0062, "rho": -0.1203, "theo": 7.9356, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 7.04999995231628}, {"option": "BKF270617C00047000", "bid": 0.0, "bid_size": 0.0, "ask": 3.8, "ask_size": 80.0, "iv": 0.3622, "open_interest": 0.0, "volume": 0.0, "delta": 0.2654, "gamma": 0.0359, "vega": 0.0982, "theta": -0.0065, "rho": 0.0523, "theo": 1.2924, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.95000004768372}, {"option": "BKF270617P00047000", "bid": 5.9, "bid_size": 1.0, "ask": 10.5, "ask_size": 1.0, "iv": 0.2097, "open_interest": 0.0, "volume": 0.0, "delta": -0.7635, "gamma": 0.0407, "vega": 0.0894, "theta": -0.0061, "rho": -0.1212, "theo": 8.8547, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 8.09999990463257}, {"option": "BKF270617C00048000", "bid": 0.0, "bid_size": 0.0, "ask": 3.7, "ask_size": 80.0, "iv": 0.3774, "open_interest": 0.0, "volume": 0.0, "delta": 0.248, "gamma": 0.0333, "vega": 0.0953, "theta": -0.0066, "rho": 0.0492, "theo": 1.2236, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.89999997615814}, {"option": "BKF270617P00048000", "bid": 6.9, "bid_size": 1.0, "ask": 11.5, "ask_size": 1.0, "iv": 0.227, "open_interest": 0.0, "volume": 0.0, "delta": -0.782, "gamma": 0.0379, "vega": 0.085, "theta": -0.006, "rho": -0.1214, "theo": 9.7854, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.0}, {"option": "BKF270617C00049000", "bid": 0.0, "bid_size": 0.0, "ask": 3.7, "ask_size": 80.0, "iv": 0.3965, "open_interest": 0.0, "volume": 0.0, "delta": 0.233, "gamma": 0.0311, "vega": 0.0916, "theta": -0.0066, "rho": 0.0457, "theo": 1.1652, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.89999997615814}, {"option": "BKF270617P00049000", "bid": 7.9, "bid_size": 1.0, "ask": 12.5, "ask_size": 2.0, "iv": 0.2437, "open_interest": 0.0, "volume": 0.0, "delta": -0.7981, "gamma": 0.0353, "vega": 0.0811, "theta": -0.0058, "rho": -0.1208, "theo": 10.725, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 9.94999980926514}, {"option": "BKF270617C00050000", "bid": 0.0, "bid_size": 0.0, "ask": 3.7, "ask_size": 80.0, "iv": 0.4149, "open_interest": 0.0, "volume": 0.0, "delta": 0.2197, "gamma": 0.029, "vega": 0.0888, "theta": -0.0066, "rho": 0.0431, "theo": 1.1136, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "no_change", "last_trade_price": 0.0, "last_trade_time": null, "percent_change": 0.0, "prev_day_close": 1.85000002384186}, {"option": "BKF270617P00050000", "bid": 8.6, "bid_size": 320.0, "ask": 13.5, "ask_size": 39.0, "iv": 0.2095, "open_interest": 0.0, "volume": 0.0, "delta": -0.8123, "gamma": 0.033, "vega": 0.0774, "theta": -0.0057, "rho": -0.1205, "theo": 11.6719, "change": 0.0, "open": 0.0, "high": 0.0, "low": 0.0, "tick": "down", "last_trade_price": 11.67, "last_trade_time": "2026-10-22T14:16:52", "percent_change": 0.0, "prev_day_close": 10.8499999046326}], "symbol": "BKF", "security_type": "stock", "exchange_id": 3, "current_price": 39.32, "price_change": 0.02, "price_change_percent": 0.0509, "bid": 39.19, "ask": 39.26, "bid_size": 200, "ask_size": 200, "open": 39.32, "high": 39.32, "low": 39.32, "close": 39.32, "prev_day_close": 39.3, "volume": 215, "iv30": 27.389, "iv30_change": 0.354, "iv30_change_percent": 1.3094, "seqno": 12881977152, "last_trade_time": "2026-11-10T09:30:00", "tick": "up"}, "symbol": "BKF"}