Calls Days until expiration: 10
Symbol & Strike Last Chng %Chng High Low Bid Ask Volume Open Int
CHK Feb 20 2010 17.50 10.60 -0.05 -0.47 10.65 10.60 6.90 7.10 26 26
CHK Feb 20 2010 20.00 4.70 0.71 17.79 5.00 4.70 4.50 4.60 2 333
CHK Feb 20 2010 21.00 3.62 0.08 2.26 3.62 3.54 3.55 3.65 15 15
CHK Feb 20 2010 22.00 2.89 0.19 7.04 2.90 2.62 2.65 2.70 23 304
CHK Feb 20 2010 23.00 1.98 0.17 9.39 2.01 1.79 1.82 1.85 214 2,820
CHK Feb 20 2010 24.00 1.10 0.06 5.77 1.33 0.89 1.11 1.14 797 1,981
CHK Feb 20 2010 25.00 0.59 0.01 1.72 0.79 0.48 0.60 0.63 622 4,954
CHK Feb 20 2010 26.00 0.34 0.03 9.68 0.43 0.23 0.29 0.32 1,020 5,068
CHK Feb 20 2010 27.00 0.14 -0.02 -12.50 0.18 0.12 0.14 0.16 703 9,195
CHK Feb 20 2010 28.00 0.08 -0.02 -20.00 0.10 0.07 0.07 0.08 553 19,887
CHK Feb 20 2010 29.00 0.05 -0.02 -28.57 0.06 0.04 0.04 0.06 224 11,317
CHK Feb 20 2010 30.00 0.03 -0.02 -40.00 0.04 0.03 0.02 0.04 81 28,390
CHK Feb 20 2010 31.00 0.02 -0.01 -33.33 0.02 0.02 0.01 0.03 4 6,269
CHK Feb 20 2010 32.00 0.04 — — 0.04 0.04 0.01 0.02 20 260
Puts Bold and highlighted options are "At the Money"
Symbol & Strike Last Chng %Chng High Low Bid Ask Volume Open Int
CHK Feb 20 2010 17.50 0.01 -0.02 -66.67 0.03 0.01 0.01 0.03 70 258
CHK Feb 20 2010 20.00 0.07 -0.05 -41.67 0.07 0.06 0.04 0.06 51 1,502
CHK Feb 20 2010 21.00 0.09 -0.04 -30.77 0.09 0.09 0.07 0.09 26 548
CHK Feb 20 2010 22.00 0.15 -0.07 -31.82 0.17 0.14 0.15 0.17 49 2,351
CHK Feb 20 2010 23.00 0.31 -0.12 -27.91 0.45 0.29 0.30 0.32 347 4,638
CHK Feb 20 2010 24.00 0.57 -0.15 -20.83 0.80 0.51 0.59 0.60 836 3,946
CHK Feb 20 2010 25.00 1.04 -0.16 -13.33 1.42 0.98 1.09 1.11 442 14,390
CHK Feb 20 2010 26.00 1.70 -0.08 -4.49 2.17 1.67 1.77 1.81 134 3,675
CHK Feb 20 2010 27.00 2.47 -0.02 -0.80 3.10 2.47 2.60 2.65 95 4,636
CHK Feb 20 2010 28.00 3.40 -0.20 -5.56 3.82 3.40 3.50 3.60 4 6,119
CHK Feb 20 2010 29.00 4.60 -0.15 -3.16 4.60 4.60 4.45 4.55 46 2,128
CHK Feb 20 2010 30.00 5.38 -0.37 -6.43 5.38 5.38 5.45 5.55 12 984
CHK Feb 20 2010 31.00 6.55 1.10 20.18 6.55 5.75 6.25 6.65 22 439
CHK Feb 20 2010 32.00 7.55 1.05 16.15 7.55 7.55 7.05 7.75 11 58
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