CNN had something the other day about if the stock market loses more than 0.5% in the month prior to the election, the incumbent has always lost... since 1904. So chalk that up in Kerry's column I guess, because the Dow lost something like 0.6% last month. Also, every time the Red Sox have won the World Series in an election year (1912 and 1916) the Democratic candidate has won!
On the other hand, I think the venerable Halloween mask sales race went to Bush this year. Don't recall how many elections that indicator has successfully predicted.