Roll Call story points out that the controversy around two VP picks, Dan Quayle in 1988 and Geraldine Ferraro in 1984, had little electoral impact those years. As in the stock market, though, past political performance is no guarantee of future results.

I think once the novelty wears off, especially since the GOP is keeping Palin so cloistered as to public interviews, her selection will not have a big impact on the election's outcome.