NISM Series XXI A PMS Short Notes – Chapter 9 & 10: Portfolio Management Process and Performance Measurement
Welcome to Part 6 of 7 in our NISM Series XXI A – PMS Distributors Exam study series. This blog covers two technically intensive chapters:
- Chapter 9: Portfolio Management Process
- Chapter 10: Performance Measurement and Evaluation of Portfolio Managers
These chapters carry significant weightage and include calculations — so read carefully and note the formulas.
📖 Previous Parts: Part 1 | Part 2 | Part 3 | Part 4 | Part 5
Table of Contents
- Asset Allocation Decision
- Correlation Across Asset Classes
- Investment Policy Statement (IPS)
- Investment Constraints
- Psychographic Analysis of Investors
- Lifecycle of Investing
- Strategic vs Tactical Asset Allocation
- Portfolio Rebalancing
- Rate of Return Measures
- Risk Measures
- Risk-Adjusted Return Ratios
- Performance Attribution Analysis
- Practice Questions
Chapter 9: Portfolio Management Process 1. The Asset Allocation Decision
Asset allocation is the process of distributing an investor's wealth across different asset classes to achieve the optimal risk-return balance.
An asset class is a group of securities sharing similar characteristics, risk-return profiles, and behaviour under market conditions.
Common asset classes:
- Equity (Domestic and International)
- Fixed Income (Bonds, Debt instruments)
- Cash and Cash Equivalents (Liquid funds, T-bills)
- Real Estate
- Commodities (Gold, Silver, Oil)
- Alternative Investments (AIFs, Structured Products)
Key Research Insight: Studies have shown that asset allocation explains approximately 90% of portfolio return variability over time — making it the single most important investment decision.
2. Correlation Across Asset Classes
Correlation measures the strength and direction of the relationship between two variables (e.g., two asset classes).
- Correlation ranges from –1 to +1
- +1: Perfect positive correlation — both move together
- 0: No correlation — movements are independent
- –1: Perfect negative correlation — they move in opposite directions
Why Correlation Matters for Diversification
| Correlation Level | Diversification Benefit |
|---|---|
| High positive (+1) | No diversification benefit — assets move together |
| Zero (0) | Some diversification benefit |
| Negative (–1) | Maximum diversification benefit — perfect hedge |
Correlation is the most critical factor in achieving risk reduction through portfolio diversification.
3. Investment Policy Statement (IPS)
The Investment Policy Statement (IPS) is the cornerstone document of the portfolio management process. It serves as the investment roadmap.
What the IPS Contains
- Investor's financial goals and objectives
- Return requirements
- Risk tolerance
- Investment constraints
- Asset allocation guidelines
- Benchmark portfolio (for performance evaluation)
- Rebalancing policy
- Review frequency
The IPS is drafted by the investor, their advisor, or both. It must be reviewed and updated periodically as the investor's financial situation and goals change over time.
4. Investment Constraints
Investment constraints are factors that limit the investor's freedom in building their portfolio. The three main categories are:
| Constraint | Example |
|---|---|
| Liquidity Constraints | Investor may need to withdraw funds at short notice. Must maintain liquid assets. |
| Regulatory Constraints | Pension funds, insurance companies, and banks are restricted from investing in certain asset classes |
| Tax Constraints | Tax treatment of different investments (LTCG, STCG, dividend income) affects investment choices |
5. Psychographic Analysis of Investors
Psychographic analysis recognises that investors are not fully rational — they have biases, emotions, and cognitive limitations that affect their decisions.
It bridges the gap between:
- Standard Finance: Treats investors as perfectly rational decision-makers
- Behavioural Finance: Recognises that investors make biased and sometimes irrational decisions
Investor Personality Types (BBK Model)
| Personality Type | Characteristics |
|---|---|
| Adventurer | Confident + Impetuous. High risk-taker, intuitive, hard to advise |
| Individualist | Confident + Careful. Independent thinker, analytical, open to advice |
| Guardian | Anxious + Careful. Risk-averse, focuses on capital preservation |
| Celebrity | Anxious + Impetuous. Follows trends and fads, needs guidance |
| Straight Arrow | Balanced — falls in the middle of all four types |
6. Lifecycle of Investing
Investor needs change over their lifetime. Portfolio strategy should evolve accordingly through these phases:
| Phase | Life Stage | Portfolio Focus |
|---|---|---|
| Accumulation Phase | Early career — income exceeds expenses | Growth-oriented; equity-heavy; build wealth |
| Consolidation Phase | Mid-career — peak earning years | Balance growth and capital protection; diversify |
| Spending Phase | Retirement — portfolio is drawn down | Income generation; capital preservation; debt-heavy |
| Gifting Phase | Later years — wealth transfer planning | Estate planning; tax-efficient wealth transfer |
7. Strategic vs Tactical Asset Allocation
| Feature | Strategic Asset Allocation (SAA) | Tactical Asset Allocation (TAA) |
|---|---|---|
| Definition | Long-term target portfolio based on investor's risk profile, goals, and constraints | Short-term deviations from SAA to exploit market opportunities |
| Frequency | Reviewed periodically (annually or on life events) | More frequent adjustments |
| Purpose | Establish the baseline portfolio structure | Capture short-term alpha by tilting allocation |
| Risk Level | Set based on long-term tolerance | May temporarily deviate — introduces short-term risk |
SAA is the target policy portfolio. TAA allows portfolio managers to take advantage of opportunities without permanently deviating from the long-term strategy.
8. Portfolio Rebalancing
Rebalancing is the process of restoring a portfolio to its original target asset allocation when market movements cause it to drift.
Why Rebalancing is Necessary:
- Different asset classes produce different returns over time
- An asset that performs well increases its weight in the portfolio beyond the target
- This changes the portfolio's risk-return profile
- Rebalancing restores the desired risk exposure
Example: If equities outperform and grow to 75% of the portfolio (vs 60% target), the portfolio must sell equities and buy other assets to return to 60%/40% split.
Chapter 10: Performance Measurement and Evaluation 9. Rate of Return Measures
| Return Measure | Definition / Formula |
|---|---|
| Holding Period Return (HPR) | HPR = (Ending Value – Beginning Value + Income) ÷ Beginning Value |
| TWRR (Time Weighted Rate of Return) | Geometric mean of sub-period returns. Eliminates the effect of client cash flows. Preferred for evaluating PM performance. |
| MWRR (Money Weighted Rate of Return) | IRR of all cash flows. Affected by timing and size of client deposits/withdrawals. Better from investor's perspective. |
| Arithmetic Mean Return | Simple average of periodic returns. Useful for single period estimation. |
| CAGR (Compounded Annual Growth Rate) | CAGR = (Ending Value ÷ Beginning Value)^(1/n) – 1. Smoothed annual growth rate. |
| Gross Return | Return before deducting management fees and expenses |
| Net Return | Return after deducting all fees and expenses. What the investor actually receives. |
| Alpha Return | Excess return generated by the PM over the benchmark (skill-based return) |
| Cash Drag Adjusted Return | Adjusts for uninvested cash sitting in the portfolio |
TWRR vs MWRR: TWRR is used to evaluate the portfolio manager's investment skill (unaffected by timing of client cash flows). MWRR reflects the actual investor experience (affected by when they invested and withdrew).
10. Risk Measures Total Risk Measures
- Variance: Average squared deviation from mean return
- Standard Deviation (SD): Square root of variance. Measures the dispersion of returns around their average. Higher SD = Higher risk.
Downside Risk Measures
- Semi-Variance: Measures dispersion of returns below the mean return only
- Target Semi-Variance: Measures dispersion of returns below a specified target return
Note: For symmetrically distributed returns, semi-variance equals half the variance and adds no new information.
Portfolio Risk vs Individual Asset Risk
Portfolio standard deviation is NOT simply the weighted average of individual assets' standard deviations (except in the extreme case of perfect positive correlation). Portfolio risk depends on:
- Weights of each investment
- Individual standard deviations
- Correlation between investments (most important factor)
Systematic vs Unsystematic Risk
| Feature | Systematic Risk | Unsystematic Risk |
|---|---|---|
| Also called | Market risk, Non-diversifiable risk | Company-specific risk, Diversifiable risk |
| Causes | Interest rates, inflation, exchange rates, economic cycles | Management failure, product recall, fraud, competition |
| Can be eliminated? | No — affects all investments | Yes — through diversification |
| Measured by | Beta (β) | Residual / Specific risk |
Beta Formula:
β = Cov(Portfolio Return, Market Return) ÷ Variance(Market Return)
- β = 1: Portfolio moves with the market
- β > 1: Portfolio is more volatile than the market (aggressive)
- β < 1: Portfolio is less volatile than the market (defensive)
Tracking Error
Tracking error = Standard deviation of the difference between portfolio return and benchmark return. Measures how closely the portfolio follows its benchmark.
11. Risk-Adjusted Return Ratios
| Ratio | Formula | Risk Adjusted For |
|---|---|---|
| Sharpe Ratio | (Portfolio Return – Risk-Free Rate) ÷ Portfolio Standard Deviation | Total risk (SD). Reward-to-variability ratio. Named after William Sharpe. |
| Treynor Ratio | (Portfolio Return – Risk-Free Rate) ÷ Beta | Systematic risk (Beta). Reward-to-volatility ratio. |
| Sortino Ratio | (Portfolio Return – Risk-Free Rate) ÷ Downside Standard Deviation | Downside risk only. Better for non-normal return distributions. |
| Information Ratio | Active Return ÷ Tracking Error | Residual (unsystematic) risk. Measures PM's skill in generating alpha. |
| M² Ratio (Modigliani Measure) | Adjusts portfolio risk to match market portfolio risk, then compares adjusted return to market return | Total risk. Expressed as a % return for easy comparison. |
Which Ratio to Use When?
- Use Sharpe Ratio when the portfolio represents the investor's entire wealth
- Use Treynor Ratio when the portfolio is one of many the investor holds (fully diversified context)
- Use Sortino Ratio when you want to focus only on downside risk
- Use Information Ratio to evaluate an active manager's skill at generating excess returns
12. Performance Attribution Analysis
Performance attribution breaks down where the portfolio's returns came from — is it from smart asset allocation or good security selection?
Two Sources of Differential Return
| Source | Explanation |
|---|---|
| Asset Allocation Effect | Differential return from overweighting/underweighting asset classes or sectors relative to the benchmark |
| Security Selection Effect | Differential return from picking specific securities that outperformed (or avoided those that underperformed) the benchmark |
Currency Return Consideration
For Indian investors holding foreign currency-denominated investments, returns must be adjusted for INR exchange rate movements. The actual return in INR may differ significantly from the local currency return.
Practice Questions — Chapters 9 & 10
-
Which return measure is unaffected by the timing of client cash flows?
a) MWRR b) TWRR c) Holding Period Return d) Alpha Return
✅ Answer: b) TWRR
-
The Sharpe Ratio measures:
a) Return per unit of systematic risk b) Return per unit of total risk (SD) c) Return per unit of downside risk d) Active return per unit of tracking error
✅ Answer: b)
-
Beta greater than 1 indicates:
a) Portfolio is less risky than the market b) Portfolio moves opposite to the market c) Portfolio is more volatile than the market d) Portfolio has no market risk
✅ Answer: c)
-
Tactical Asset Allocation (TAA) differs from SAA because:
a) TAA is the long-term policy portfolio b) TAA makes short-term deviations to exploit market opportunities c) TAA is used only for debt portfolios d) TAA ignores risk tolerance
✅ Answer: b)
-
Which risk measure is used by Information Ratio?
a) Standard Deviation b) Beta c) Tracking Error d) Semi-variance
✅ Answer: c) Tracking Error
Key Takeaways — Chapters 9 & 10 at a Glance
- Asset allocation = Most important investment decision (explains ~90% of return variability)
- Correlation: –1 to +1 | Lower correlation = Better diversification
- IPS = Investment roadmap — must be updated as goals change
- SAA = Long-term target | TAA = Short-term tactical moves
- TWRR = PM performance | MWRR = Investor experience
- Systematic risk = Market risk, measured by Beta | Unsystematic risk = Diversifiable
- Sharpe: Total risk | Treynor: Systematic risk | Sortino: Downside risk | Information Ratio: Tracking error
- Performance attribution: Asset allocation + Security selection
Internal Links
- 📘 ← Part 5: Operational Aspects of PMS
- 📘 Part 7: Taxation, Regulatory & Ethical Aspects →
- 🎯 Free NISM XXI A Mock Test →
Tags: NISM Series XXI A, portfolio management process, asset allocation, investment policy statement, sharpe ratio, treynor ratio, sortino ratio, information ratio, TWRR MWRR, beta systematic risk, performance attribution, nism study material