Over the past 10 years, Bill Ackman returned 154.4% compared to 254.2% for the S&P 500 — underperformed the S&P 500 by 99.8%.
-1.5%
S&P 500: 20.1%
14.4%
S&P 500: 77.1%
14.0%
S&P 500: 75.9%
154.4%
S&P 500: 254.2%