The Super Bowl "theory" says that if a team from the original * National Football League wins the Super Bowl, the stock market increases for the rest of the year, and if a team from the old American Football League wins, the stock market goes down.
For 1967-1997 this was right 28 out of 31 times (if you use the Dow Jones Industrial average- DJIA) or 90% of the time. It failed four years in a row from 1998-2001, but still had and 80% success rate thru 2006.

(Note: results are not as good if you use the S&P 500 instead of the DJIA, because there are years when one went up and the other went down.)

New York investment adviser Robert Stovall first noticed the correlation between Super Bowl wins and stock market gains in 1979. It's among the most accurate of the dozens of offbeat economic indicators that market watchers follow.

Economist Paul M. Sommers of Middelbury College in Vermont has analyzed the data for the years from 1967 to 1998 and included the division and total points. He reported his findings in the May, 2000 College Mathematics Journal. Sommers' model suggests that the stock market posts a significantly higher gain if the Super Bowl winner is from the National Football Conference Western Division. Moreover, the higher the combined team point totals are, the lower the percentage change in the Dow Jones Industrial Average.

The fact that the NVC dominated up till 1997 and the market has a general tendency to go up helped.

Super Bowl winners and the Dow Jones Industrial Avereage
Year Winner Conf Total
Points
% Change
in DJIA
Theory
Result
1967 Green Bay NFC 45 8.38  
1968 Green Bay NFC 47 4.98  
1969 New York Jets AFC 23 -13.52  
1970 Kansas City AFC 30 5.11  
1971 Baltimore * NFL/
AFC
29 5.26  
1972 Dallas NFC 27 12.5  
1973 Miami AFC 21 -18.14  
1974 Miami AFC 31 -26.77  
1975 Pittsburgh * NFL/
AFC
22 29.39  
1976 Pittsburgh NFL/
AFC
38 8.07  
1977 Oakland AFC 46 -15.46  
1978 Dallas NFC 37 3.77  
1979 Pittsburgh NFL/
AFC
66 0.15  
1980 Pittsburgh NFL/
AFC
50 11.17  
1981 Oakland AFC 37 -6.93  
1982 San Francisco NFC 47 23.85  
1983 Washington NFC 44 18.21  
1984 L.A. Raiders AFC 47 -3.78
1985 San Francisco NFC 54 26.02  
1986 Chicago NFC 56 23.92  
1987 New York Giants NFC 59 -7.74  
1988 Washington NFC 52 10.74  
1989 San Francisco NFC 36 23.17  
1990 San Francisco NFC 65 2.91
1991 New York Giants NFC 39 19.16  
1992 Washington NFC 61 2.11  
1993 Dallas NFC 69 13.42  
1994 Dallas NFC 43 -2.81  
1995 San Francisco NFC 75 32.64  
1996 Dallas NFC 44 22.32  
1997 Green Bay NFC 56 18.1  
1998 Denver AFC 55 20.61  
1999 Denver AFC 53 22.85  
2000 St. Louis NFC 39 -6.1  
2001 Baltimore AFC 41 -7.1  
2002 New England AFC 37 -16.8  
2003 Tampa Bay NFC 69 23.9  
2004 New England AFC 61 3.1  
2005 New England AFC 45 -0.8
2006 Pittsburgh NFL/
AFC
31 16.3  
2007 Indianapolis NFL/
AFC
46 7.2  
2008 NY Giants NFC 31    
* In 1970, NFL teams Pittsburgh, Baltimore and Cleveland joined 10 AFL teams to form the American Football Conference, so they are still counted as NFL teams.
By 2001 the Baltimore Colts had moved to Indianapolis and the Baltimore Ravens were an AFC team.

† - In 1984 and 2005 the S&P 500 went up while the Dow was flat or went down slightly. In 1990 the S&P went down and the Dow went up.

References:
Sommers, P.M. 2000. The Super Bowl theory: Fourth and long. College Mathematics Journal 31(May):189.
Peterson, I. 2000. Super Bowls and stock markets. Science News 157(June 17):399.

Links:
Ivars Peterson's MathTrek
Business Week


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last updated 8 Apr 2007
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