How stock market indexes are calculated can skew their data. Learn about index limitations, using indexes effectively, and other tools that might help with investment decisions.
The Sortino ratio focuses only on the downside risk of a portfolio, which is what short-term investors may want if they've got a short-term goal. The higher the Sortino ratio, the better the risk-adjusted return.
Want to cut through the noise on fund performance? The Information ratio can help you identify funds—and fund managers—who may be outperforming their peers.
Warren Buffett bet $1,000,000 that an index fund would perform better than hedge funds. See how an S&P 500® index fund stacked up against a hedge fund manager's selections.