Benchmark Index
A standard market index used to measure and compare the performance of investment portfolios and fund managers.
What is Benchmark Index?
A benchmark index is a standard portfolio, typically a market-capitalization-weighted basket of securities, used to measure and compare the performance of investment managers, mutual funds, ETFs, and individual portfolios. Common benchmarks include the S&P 500 for U.S. large-cap equities, the Bloomberg U.S. Aggregate Bond Index for fixed income, and the MSCI World Index for global equities. Portfolio managers are evaluated against their designated benchmark; consistently outperforming the benchmark after fees is the primary goal of active management and the benchmark return is the baseline against which alpha is measured.
Example
A U.S. large-cap equity fund manager who returns 11% in a year when the S&P 500 returned 13% has underperformed the benchmark by 2 percentage points. That 2% shortfall is the negative alpha, and it illustrates why benchmark selection matters critically for evaluating active management skill.
Source: S&P Dow Jones Indices — S&P 500