Measurement of Risk and Performance Factors by Asset Class (Part 4)

To effectively evaluate a mutual fund, investors must look beyond raw returns and understand the quantitative measures of risk and the specific economic drivers that influence different asset classes like debt, gold, and real estate. Professional fund management involves not just seeking profit, but actively managing these metrics to ensure the portfolio remains within its stated risk-return mandate.

Quantitative Measures of Risk

Risk in mutual funds is quantified using statistical tools that measure volatility and sensitivity to market movements.

1. Total Risk: Variance and Standard Deviation

• Variance: This measures the fluctuation in periodic returns of a scheme compared to its own average return. It provides a sense of how "spread out" the returns are.
  • Formula: Variance = average of squared deviations from the mean.
• Standard Deviation: This is the most common measure of total risk in an investment. A high standard deviation indicates greater volatility and, consequently, higher risk.
  • Formula: Standard Deviation = square root of variance.

2. Market Risk: Beta

Based on the Capital Asset Pricing Model (CAPM), Beta measures the fluctuation in a scheme's periodic returns compared to the fluctuations of a diversified stock index (the market).

• Interpretation: A Beta of 1 indicates the fund moves in line with the market. A Beta higher than 1 suggests the fund is more volatile than the market, while a Beta lower than 1 suggests it is less volatile.

3. Debt-Specific Sensitivity Measures

• Modified Duration: This measures the sensitivity of a debt security's value to changes in interest rates.
  • Key Rule: The higher the modified duration, the higher the interest rate risk in the portfolio.
• Weighted Average Maturity (WAM): This is the average time until all securities in a portfolio mature. Generally, a longer WAM indicates higher interest rate sensitivity.

Factors Influencing Asset Class Performance

Performance is driven by different macroeconomic variables depending on the type of fund.

Performance Drivers of Debt Schemes

• Interest Rates: There is an inverse relationship between market yields and the value of fixed-rate debt securities. If market yields rise to 9% while an investor holds an 8% security, that security loses value as it becomes less attractive.
• Credit Spreads: If a company's credit rating improves, the market accepts a lower credit spread, which increases the value of its debt securities.

Performance Drivers of Gold Funds

• Global Gold Prices: As a "safe haven" asset, gold prices typically rise during political or economic turmoil. Large-scale buying or selling by institutions like the IMF or central banks also pushes prices up or down.
• Strength of the Rupee: Because gold is priced globally in US Dollars, a stronger Indian Rupee means the same gold price translates into a lower rupee value for the gold portfolio.

Performance Drivers of Real Estate Funds

• Economic Scenario: Real estate prices often weaken during recessions as purchases are postponed, and they tend to keep pace with an improving economy.
• Infrastructure and Rates: Local infrastructure development increases property values. Conversely, rising interest rates make money "expensive," which typically softens the real estate market.

Active Risk Management Strategies

Investment managers use specific processes to mitigate the risks discussed above:

• Managing Market Liquidity: Managers select fixed-income securities expected to have high secondary market liquidity and manage them within strict portfolio limits.
• Managing Credit Risk: This is handled through rigorous in-house credit analysis and due diligence before assigning credit limits to any borrower.
• Managing Rating Migration: Managers endeavour to invest in high-grade/quality securities and perform periodic credit reviews to address company-specific issues before a downgrade occurs.

Key Takeaways

Important Terms

• Safe Haven Asset: An investment expected to retain or increase in value during times of market turbulence (e.g., Gold).
• Credit Spread: The difference in yield between a risk-free government bond and a debt security with credit risk.
• Systematic Risk: Market-wide risk that cannot be eliminated through diversification (measured by Beta).
• Unsystematic Risk: Risk specific to a single company or industry (also called firm-specific risk).