http://www.marketwatch.com/story/should-followers-of-halloween-indicator-buy-now-2009-10-14?siteid=yahoomyYou should be completely out of stocks right now, sitting comfortably with 100% cash in your portfolio.
That at least is the current posture of the stock market timing system that arguably has the strongest statistical foundation of any that is in widespread use today.
I'm referring to the so-called Halloween Indicator, which says that we should be invested in the stock market for just six months each year, from Halloween until May Day. During the other six months we are to be in cash -- which is why this Indicator also goes by the name "Sell in May and Go Away."
The statistical pattern on which this indicator is based has been found to exist in the U.S. stock market back to the 1800s, in the United Kingdom stock market back to 1694, and in 35 of 36 foreign countries studied.
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=300700