Over the past 10 years, Joel Greenblatt returned -92.3% compared to 259.5% for the S&P 500 — underperformed the S&P 500 by 351.7%.
14.8%
S&P 500: 15.9%
45.5%
S&P 500: 79.6%
-95.8%
S&P 500: 76.5%
-92.3%
S&P 500: 259.5%