SPX vs Presidential + Decennial + Annual Cycles | September 2016

September is the only month to show more losing months than winning months
over the past 66 years. It also sports the largest average loss (-0.68%).
October actually has a decent track record (up 41 times - or 62% of the
time - down 25 times, with an average gain of +0.80%). However, this
record is tainted somewhat as many investors - not entirely incorrectly -
have come to refer to October as "Crash Month". To wit, 1929, 1930, 1932,
1933, 1937, 1941, 1978, 1979, 1987, 1997 and 2008 all witnessed sharp
declines in the stock market during the month of October.
Calculation: www.moneychimp.com