Relevant Benchmarks

With all these return measures in hand, the final question is: how do you know if a portfolio actually performed well? You need a benchmark: a standard of comparison that tells you whether the manager added value or simply rode market momentum.

What Is a Benchmark?

• A benchmark is a standard index or composite against which portfolio performance is measured
• Must be appropriate for the portfolio's investment strategy, asset class, and style
• Allows investors and advisers to determine whether a manager is adding value through active management
• Active managers are measured by their ability to outperform the benchmark on a risk-adjusted basis (e.g., generate positive alpha); beating the benchmark's raw return and having positive alpha are related but not identical, since alpha compares actual return to the CAPM-predicted return for that level of risk

Think of it this way: A benchmark answers the question, "Could I have just bought an index fund instead?" If the manager's raw returns lag the benchmark after fees, that's a strong signal the answer is yes, though a full risk-adjusted comparison (alpha) is the more precise test.

Common Benchmark Indices

Exam Tip: Gotchas

• S&P 500 is for large-cap U.S. stocks only. It does not apply to small-cap, international, or bond portfolios.
• MSCI EAFE excludes the U.S. and Canada. It covers international developed markets only.
• Russell 2000 is for small-cap. A common mix-up is confusing it with the Russell 3000, which covers roughly 98% of the investable U.S. equity market by capitalization.
• Bloomberg Aggregate Bond Index is for U.S.-dollar-denominated, investment-grade, fixed-rate taxable bonds available in the U.S. market. It does not cover high-yield bonds.
• Positive alpha means risk-adjusted outperformance, not just higher raw returns. The manager beat the benchmark after accounting for the level of risk taken.

Selecting an Appropriate Benchmark

A portfolio should be compared to a benchmark with similar characteristics:

• Style: A value fund should be compared to a value index, not a growth index
• Market capitalization: A small-cap fund should be benchmarked against the Russell 2000, not the S&P 500
• Geography: An international fund should use MSCI EAFE or MSCI Emerging Markets, not a domestic index
• Asset class: A bond portfolio should be compared to a bond index, not an equity index

Custom (Blended) Benchmarks

• Multi-asset portfolios may need a custom benchmark that blends multiple indices
• Example: A 60/40 portfolio might use 60% S&P 500 + 40% Bloomberg Aggregate Bond Index
• The blend should reflect the portfolio's actual target allocation

Why Benchmark Selection Matters

• An inappropriate benchmark can make results misleading
• A small-cap manager who beats the S&P 500 during a small-cap rally may look skilled, but the correct comparison is the Russell 2000
• A bond manager who underperforms the S&P 500 hasn't necessarily failed on that comparison alone; bonds and stocks are different asset classes, so the manager should be judged against an appropriate bond benchmark instead
• Advisers have a responsibility to select benchmarks that provide a fair and meaningful comparison

Exam Tip: Gotchas

• Comparing a small-cap fund to the S&P 500 (a large-cap index) is a classic example of an inappropriate benchmark. The exam frequently tests whether you can spot a mismatched benchmark. Match the benchmark to the portfolio's style, cap size, and geography.

What Should You Check on Exam Day?

• A benchmark must be appropriate for the portfolio's style, market capitalization, geography, and asset class.
• S&P 500 = large-cap U.S.; Russell 2000 = small-cap U.S.; MSCI EAFE = international developed (excludes U.S. and Canada); Bloomberg U.S. Aggregate = investment-grade, dollar-denominated, fixed-rate taxable U.S. bonds; MSCI Emerging Markets = emerging-market equities.
• Comparing a small-cap fund to the S&P 500 is the classic mismatched-benchmark trap.
• Multi-asset portfolios often use a custom blended benchmark reflecting the actual target allocation, though a published multi-asset index can also be the benchmark.
• Active managers are judged by their ability to generate positive alpha (risk-adjusted outperformance versus what CAPM predicts) relative to the appropriate benchmark, which is related to but not identical to a higher raw return.