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Has anyone thought to do a regression test to verify? I was not able to download historical prices for the DOW, but if you use the SPX from 1950 the correlation is low, R squared is 0.633. 10/12/12

I thought any correlation above .6 was considered significant? 10/13/12

One way to think of this, is that an R squared value of 0.633 implies that only 63.3% of the data is correlated. 10/13/12