Both the Pittsburgh Steelers and the Green Bay Packers are old NFL teams, meaning they were part of the NFL before the league merged with the AFL. Super Bowl victories by old NFL teams lead to full-year gains for stocks nearly 80% of the time.

FORBES: Super Bowl And Other January Indicators Bode Well For Stocks

It's shaping up as an NFL classic--the Green Bay Packers vs. the New York Giants meeting at historic Lambeau Field, with a trip to the Super Bowl on the line.

FORBES: The NFL's Coldest Games

After playing for the Green Bay Packers, New York Jets and Minnesota Vikings, NFL quarterback Brett Favre was back on the football field in Chicago throwing touchdown passes (and interceptions) again.

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