Who Makes Out in the Stock Market?

Someone sent this to me:

According to a 2004 study by Georgia State University researchers, ased on public information, one "investor group" substantially outperforms not only the stock market as a whole but also financial houses' top stock-pickers. That investor group is U.S. senators, who somehow between 1993 and 1998 beat the market by an average of 12 percent annually (whereas fund managers are regarded as "stars" if they beat the market by as little as 3 percent). The findings received heightened attention recently, following revelations that a prominent senator this year made a huge profit selling stock from his blind trust at just the right time. [The New Yorker, 10-31-05]