Eric Singer, Manager of the fund Advisor, Congressional Effect Management, first published an article on the general effect of Congress on daily stock prices in an article published in Barron’s in 1992. Since then the idea has attracted support and evidence from both the financial and academic community
Interesting strategy...Congress in Session = Go away.
Invests in the S&P 500 index when congress is not in session. Not sure if the fund follows this exactly but here's (was) the congressional schedule for 2011:http://www.thecapitol.net/FAQ/cong_schedule.html