The S&P500 has a very strong seasonal pattern from now until the end of April. One of the sayings in Wall Street is βSell in May, and go Awayβ. It seems that one of the last big pushes in the US index comes as we approach May. The shares are entering a strong time of the year. From April 14 through to May 01 the shares have gained nineteen times in the last twenty five years. The average return has been +2.09% over the last 25 years with a 56.91% annualized growth rate.