What is a Benchmark?
A benchmark is a reference index used to evaluate investment performance. The S&P 500 is the most common benchmark for US large-cap stock funds. If your fund returned 8% but the S&P 500 returned 12%, your fund underperformed its benchmark by 4 percentage points. Common benchmarks include the MSCI World Index for global stocks and the Bloomberg Aggregate for US bonds.
Choosing the Right Benchmark
The benchmark must match the investment's style and geography. Comparing a small-cap value fund to the S&P 500 is misleading because they target different market segments. A proper benchmark for a Japanese equity fund would be the TOPIX or Nikkei 225, not the S&P 500. Multi-asset portfolios should use a blended benchmark reflecting their target allocation.
Key Considerations
Benchmark selection can be manipulated to make performance look better. Some funds choose easy-to-beat benchmarks or switch benchmarks after poor performance. Always verify that the benchmark is appropriate for the fund's stated strategy. For personal portfolios, a simple global stock-bond index blend matching your target allocation serves as an honest benchmark.