Warren Buffett's 2008-2017 bet proved that a low-cost S&P 500 index fund (125.8% return) significantly outperformed five hedge funds of funds (2.8%-87.7% returns), primarily due to high fees. Since the bet ended in 2017, the same index fund has more than tripled, gaining 233% through 2026. Excluding 2008's financial crisis, both periods showed similar ~15% annual returns, supporting Buffett's case for passive index investing over active hedge fund management.
Axe note: The S&P 500’s strong post-2017 gains highlight the advantages of passive investing over hedge funds.