As it turns out, as the New York Times also showed in October, the Democratic Party "has been better for American pocketbooks and capitalism as a whole."
As of Friday, a $10,000 investment in the S.& P. stock market index would have grown to $11,733 if invested under Republican presidents only, although that would be $51,211 if we exclude Herbert Hoover's presidency during the Great Depression. Invested under Democratic presidents only, $10,000 would have grown to $300,671 at a compound rate of 8.9 percent over nearly 40 years.
Slate ran the numbers and found that since 1900, Democratic presidents have produced a 12.3 percent annual total return on the S&P 500, but Republicans only an 8 percent return