The cycle of option expiration months, the most common cycles being: January, April, July, October (JAJO); February, May, August, November (FMAN); and March, June, September, December (MJSD).
OPTION CYCLE
Meaning of OPTION CYCLE in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012