Normally, option symbols are composed of the first three letters of the stock symbol, followed by the expiration month code, and the strike code.

Expiration Month Codes:		Strike Price Codes:
Month     Call     Put     Jan. A M Feb. B N Mar. C O April D P May E Q June F R July G S Aug. H T Sept. I U Oct. J V Nov. K W Dec. L X		Strike Price     Code     Strike Price     Code     5, 105, 205 A 65, 165, 265 M 10, 110, 210 B 70, 170, 270 N 15, 115, 215 C 75, 175, 275 O 20, 120, 220 D 80, 180, 280 P 25, 125, 225 E 85, 185, 285 Q 30, 130, 230 F 90, 190, 290 R 35, 135, 235 G 95, 195, 295 S 40, 140, 240 H 100, 200, 300 T 45, 145, 245 I 7.5 U 50, 150, 250 J 12.5 V 55, 155, 255 K 17.5 W 60, 160, 260 L 22.5 X