Maybe not: http://www.yale.edu/leitner/resources/papers/Eggmueller_2011... ("The average investor in Congress underperformed the market by 2-3% annually during this period, a finding that contrasts with earlier research showing uncanny timing in Congressional trades during the 1990s. Members in- vested disproportionately in local companies and campaign contributors, and these political" investments outperformed the rest of their portfolios (local investments beat the market by 4% annually). Our findings suggest that informational advantages enjoyed by Congressmen as investors arise primarily from their relationships with local companies, and that widespread concerns about corrupt and self-serving investing behavior in Congress have been misplaced.")