September’s option expiration week is up 59.0% of the time for S&P 500 since 1982. DJIA and NASDAQ have slightly weaker track records with gains 53.8% of the time and 56.4% of the time respectively. However, the week has suffered several sizable losses. The worst loss followed the September 11 terrorist attacks in 2001. In the last eighteen years, S&P 500 and NASDAQ are tied for best record during September’s option expiration week, up thirteen times. Friday had been firm with all three indices advancing every year 2004 to 2011, but S&P 500 has been down eight of the last nine since.