Skip to content

NISM-Series-XXI-A: Portfolio Management Services (PMS) Distributors · Performance Measurement and Evaluation of Portfolio Managers

Benchmarking and Peer Comparison of Portfolio Managers

Updated 11 October 2026 · Fact-checked

Benchmarking means measuring a portfolio manager's return against a suitable market index that matches the strategy. Peer comparison measures the manager against others with similar strategies. To solve questions, match the strategy to the index, prefer a total return index, compare over the same period, and judge excess return.

Understand Benchmarking and Peer Comparison of Portfolio Managers

A portfolio return on its own tells you little. If a PMS made 14% in a year, is that good? It depends on what the market did. A benchmark is the yardstick. It is usually a market index that represents the opportunities the manager chose from. If the benchmark returned 10%, the manager added value. If it returned 18%, the manager lagged.

The benchmark must fit the strategy. A large-cap portfolio should be compared with a large-cap index such as the Nifty 50 or the BSE Sensex. A mid-cap or small-cap strategy should be compared with a mid-cap or small-cap index. A multi-cap strategy may use a broad index such as the Nifty 500 or BSE 500. A debt strategy needs a debt index, not an equity index. A hybrid strategy may use a blend of indices in fixed weights.

A good benchmark has these characteristics: it is appropriate to the strategy, it is investable (the manager could actually hold its stocks), it is transparent with published rules and constituents, it is measurable with data available regularly, it is specified in advance, and it is unambiguous. The benchmark should be chosen before the investment period begins, not picked later because it flatters the result.

Price index versus total return index (TRI): a price index tracks only price changes. A TRI also assumes dividends are reinvested. A portfolio's return includes dividends, so the fair comparison is with a TRI. Comparing a portfolio with a price index overstates the manager's skill because the index ignores dividend income.

Peer comparison ranks the manager against other managers with a similar strategy, size and style. It shows how the manager did relative to others in the same conditions. It has limits: peer groups can be small, strategies differ in practice, and managers may have different start dates. Use both benchmark and peer comparison together, over the same period and preferably over several years, not one good quarter.

In India, SEBI's portfolio manager framework expects the performance of a portfolio manager to be reported with reference to a benchmark, and the benchmark is disclosed in the disclosure document. Read the exact wording in your NISM workbook for the details of the disclosure requirement.

Key formulas to remember

Excess return (alpha over benchmark)
Excess return = Portfolio return − Benchmark return
Positive means the manager outperformed. Both returns must cover the same period and be calculated the same way.
Characteristics of a good benchmark
Appropriate • Investable • Transparent • Measurable • Specified in advance • Unambiguous
Remember these as a checklist. Exam options often swap in wrong traits such as 'highest return' or 'most popular'.
Fair comparison rule
Portfolio return (with dividends) ↔ Total return index (TRI)
A price index leaves out dividends, so it understates the benchmark's return.

How to solve Benchmarking and Peer Comparison of Portfolio Managers questions

Use this method for any question on choosing or using a benchmark or peer group.

  1. 1Identify the strategy: large-cap, mid-cap, small-cap, multi-cap, thematic, debt or hybrid.
  2. 2Match it to the index that represents the same universe, for example a mid-cap strategy to a mid-cap index.
  3. 3Check the benchmark against the good-benchmark traits: appropriate, investable, transparent, measurable, specified in advance.
  4. 4Choose the TRI over the price index when the question asks for the fair comparison.
  5. 5Confirm both returns cover the same period and are on the same basis (pre-tax or post-tax, same method).
  6. 6Compute excess return as portfolio return minus benchmark return and read the sign.
  7. 7For peer comparison, check that the peers follow a similar strategy and size, and look at multi-year results.
  8. 8Pick the option that is most specific to the strategy and least open to manipulation.

Quickest way: Match, TRI, same period

When to use it: Use this when a question gives a strategy and several index options, or asks which comparison is fair.

  1. Match the index to the strategy's market-cap or asset class.
  2. If dividends are mentioned, choose the TRI.
  3. Reject options that choose the benchmark after seeing results.
  4. Subtract benchmark from portfolio return for the excess.
  5. For peers, accept only a similar-strategy group.

Common mistakes in Benchmarking and Peer Comparison of Portfolio Managers

  • Comparing a mid-cap or small-cap PMS with the Nifty 50.

    The Nifty 50 is the best-known index, so students pick it by habit.

    Fix: Match the index to the strategy. Use a mid-cap or small-cap index for those strategies, or a broad index for multi-cap.

  • Using a price index when a TRI is available.

    Students forget that portfolio returns include dividends.

    Fix: Remember that TRI includes reinvested dividends. It is the like-for-like comparison.

  • Thinking a good benchmark is the one with the highest return.

    Students confuse a benchmark with a target.

    Fix: A benchmark is a fair yardstick, judged by appropriateness, investability and transparency, not by its return.

  • Choosing or changing the benchmark after seeing performance.

    It seems harmless to pick a better-looking index.

    Fix: A benchmark must be specified in advance. Changing it later makes the comparison biased.

  • Treating peer ranking as proof of skill.

    A top rank looks conclusive.

    Fix: Peer groups can be small and mixed in strategy. Use peer ranking together with benchmark comparison over several years.

Worked examples

Example 1

A PMS runs a large-cap strategy and returned 12.4% in a year. The Nifty 50 TRI returned 11.1% and the Nifty 50 price index returned 9.6%. What is the manager's excess return on the fair comparison?

Show the solution
  1. The strategy is large-cap, so the Nifty 50 is suitable.
  2. Portfolio return includes dividends, so the fair comparison is the TRI.
  3. Excess return = 12.4% − 11.1%.
  4. Excess return = 1.3%.

Answer: Excess return is 1.3 percentage points over the Nifty 50 TRI. Using the price index would wrongly show 2.8 points.

Example 2

Which of the following is the most appropriate benchmark for a PMS whose portfolio holds only small-cap stocks? (A) Nifty 50 (B) A small-cap index (C) A 10-year government bond index (D) The index that gave the highest return last year

Show the solution
  1. The benchmark must represent the strategy's universe.
  2. The Nifty 50 holds large caps, so it does not match.
  3. A bond index is a different asset class.
  4. Choosing last year's best index is selecting after the fact and is not appropriate.
  5. A small-cap index matches the universe and is investable and transparent.

Answer: (B) A small-cap index.

Exam tips

  • Expect 'which benchmark suits this strategy' questions. Match market-cap or asset class first.
  • Learn the characteristics list of a good benchmark. Options often include a false trait such as 'highest return'.
  • For TRI versus price index, the answer is nearly always TRI for a like-for-like comparison.
  • Do not rely on memory for SEBI disclosure details beyond what the workbook states. Choose the option that stresses disclosure in advance.
  • Note the marking: 1 mark per question and 10% negative marking, so a wrong answer costs little, but still eliminate wrong options first.

Practice questions from Performance Measurement and Evaluation of Portfolio Managers

Benchmarking and Peer Comparison of Portfolio Managers in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Benchmarking and Peer Comparison of Portfolio Managers: frequently asked questions

How do I choose a benchmark for a PMS?

Match the index to the strategy. Use a large-cap index for large-cap strategies, a mid or small-cap index for those strategies, a broad index for multi-cap and a debt index for debt. Check it is investable, transparent and fixed in advance.

What is the difference between a TRI and a price index?

A price index tracks only price changes. A total return index also assumes dividends are reinvested. Since a portfolio earns dividends, the TRI gives a fairer comparison.

What makes a good benchmark?

It is appropriate to the strategy, investable, transparent, measurable, specified in advance and unambiguous. Its return level is not a test of quality.

Why compare a manager with peers as well as a benchmark?

The benchmark shows performance against the market. Peers show performance against other managers with similar strategies. Using both gives a fuller view, though peer groups have limits.