http://www.zerohedge.com/news/chart-year-fed-has-doubled-sp-admits-fed Incredible! We show that since 1994, more than 80 percent of the equity premium on U.S. stocks has been earned over the twenty-four hours preceding scheduled Federal Open Market Committee (FOMC) announcements (which occur only eight times a year)âa phenomenon we call the pre-FOMC announcement âdrift.â