Expiration Month - Expiration Month is the month when the option terminates. MacOptions uses this field to compute the expiration date of most options, which is the third Friday of the month. For options that don't terminate on this date the Expiration Date field must be changed to the correct date. Valid entries are: JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC.
