Super Bowl Indicator: an indicator based on the superstition that a Super Bowl win for a team from the old AFL (now AFC division) foretells a bear market (down market) for the coming year, and a win for a team from the old NFL (NFC division) means it will be a bull market (up market). It was “discovered” by sportswriter Leonard Koppett in the 1970s.
Sources: Investopedia, Wikipedia, Business Dictionary