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Benchmark

In short

Reference index used to measure portfolio performance — usually S&P 500

A benchmark is your measuring stick. If you earned 12% but the S&P 500 (your benchmark) earned 15%, you actually underperformed despite making money. Most active managers struggle to consistently beat their benchmark.

Benchmarks provide context for portfolio returns. The S&P 500 is the most common equity benchmark; the Bloomberg US Aggregate Bond Index for bonds. Risk-adjusted benchmarking (Sharpe, alpha) is more meaningful than raw return comparison.

Related concepts

  • Alpha — Alpha is the extra return a fund earns above what you'd expect given its risk. If the market returns 10% and your fund returns 13% with the same risk, alpha is 3%. Positive alpha = the manager adds value.
  • Information Ratio — If a manager beats the market by 2% per year on average, but the outperformance swings wildly (+10%, -6%, +2%...), the information ratio is low. Higher IR means consistent, reliable outperformance.
  • Index Fund — An index fund automatically owns every stock in an index (like the S&P 500). No stock picking. Very low fees. You get the market's return. Studies show 80-90% of active fund managers underperform index funds over 15 years.
  • Passive Investing — Passive investing means buying index funds and holding them forever. No stock picking, no market timing. You get exactly what the market returns, minus tiny fees. Research consistently shows it beats most active strategies over the long run.