As millions of people around the world watched the Super Bowl in February, at least some were concerned more about how the outcome would affect their portfolios than the game itself.
According to the Super Bowl Indicator (SBI) theory, the winning team indicates the fate of the stock market for the rest of the year. The theory holds that if a team from the former American Football League (like the Baltimore Ravens) wins, the outlook for stocks is bearish.
On the other hand, a win by an original National Football League team (like the San Francisco 49ers) indicates that the market will go up that year. The SBI has been remarkably accurate, correctly predicting the annual direction of the stock market about 75% of the time.