% strike_ best_ impl_ % secid date ticker close exdate price best_bid offer volatility % omitted fields all like this %108105 30JUN2005 SPX 1191.33 17JUN2006 500000 0.00 0.20 0.30700 % 1 = call 2 = put % strike bid offer implied vol 1 500000 687.20 687.70 NaN 1 550000 639.20 639.70 NaN 1 600000 591.20 591.70 NaN 1 650000 543.30 543.80 NaN 1 700000 495.70 496.20 NaN 1 750000 448.20 448.70 0.15770 1 800000 401.20 401.70 0.20286 1 850000 354.70 355.20 0.20413 1 900000 308.90 309.40 0.19913 1 950000 264.10 264.60 0.19172 1 995000 224.80 225.30 0.18332 1 1000000 220.50 221.00 0.18229 1 1050000 178.70 179.20 0.17226 1 1075000 158.60 159.10 0.16689 1 1100000 139.20 139.70 0.16149 1 1125000 120.60 121.10 0.15604 1 1150000 103.00 103.50 0.15074 1 1175000 86.50 87.00 0.14551 1 1200000 71.20 71.70 0.14025 1 1225000 57.50 58.00 0.13557 1 1250000 45.20 45.70 0.13075 1 1275000 34.70 35.20 0.12652 1 1300000 25.80 26.30 0.12237 1 1325000 18.80 19.00 0.11875 1 1350000 13.20 13.40 0.11548 1 1375000 9.00 9.20 0.11267 1 1400000 6.00 6.20 0.11046 1 1450000 2.50 2.70 0.10742 1 1500000 1.00 1.20 0.10649 1 1600000 0.15 0.35 0.11017 2 500000 0.00 0.20 0.30700 2 550000 0.05 0.25 0.28607 2 600000 0.35 0.45 0.28375 2 650000 0.50 0.70 0.26618 2 700000 0.95 1.15 0.25510 2 750000 1.70 1.90 0.24499 2 800000 2.75 2.95 0.23331 2 850000 4.40 4.60 0.22280 2 900000 6.70 6.90 0.21148 2 950000 10.00 10.20 0.20033 2 995000 14.10 14.30 0.19027 2 1000000 14.60 14.80 0.18899 2 1050000 20.70 21.20 0.17718 2 1075000 24.70 25.20 0.17139 2 1100000 29.40 29.90 0.16565 2 1125000 34.90 35.40 0.15993 2 1150000 41.30 41.80 0.15418 2 1175000 48.90 49.40 0.14881 2 1200000 57.70 58.20 0.14349 2 1225000 68.00 68.50 0.13858 2 1250000 79.80 80.30 0.13385 2 1275000 93.40 93.90 0.12978 2 1300000 108.60 109.10 0.12591 2 1325000 125.50 126.00 NaN 2 1350000 144.00 144.50 NaN 2 1375000 163.80 164.30 NaN 2 1400000 184.90 185.40 NaN 2 1450000 229.50 230.00 NaN 2 1500000 276.10 276.60 NaN 2 1600000 371.50 372.00 NaN