Over the past 10 years, Joel Greenblatt returned -92.1% compared to 259.4% for the S&P 500 — underperformed the S&P 500 by 351.4%.
13.7%
S&P 500: 13.0%
36.3%
S&P 500: 85.6%
-96.0%
S&P 500: 67.8%
-92.1%
S&P 500: 259.4%