# Why raw returns are only the starting point
# Fees and the long-term effect of expense ratios
# Portfolio concentration and sector tilt
# Risk-adjusted metrics and downside behaviour
# Process, people and continuity
# AUM, liquidity and tracking error Assets under management (AUM) affect how a fund executes trades and manages liquidity. For index funds, tracking error is a key metric: it measures how closely an index fund follows its benchmark. Large AUM with poor liquidity in niche segments can change how a manager must execute, which affects future returns and volatility.
# Practical checklist for side-by-side fund comparison
- Confirm expense ratio and compare net returns after fees.
- Compare top-10 holdings and sector weights to assess concentration.
- Review Sharpe, alpha, beta and downside-capture metrics for risk-adjusted insight.
- Check fund manager tenure, turnover and recent changes in process or mandate.
- Look at AUM and liquidity implications for the fund's stated strategy.
- Use AMFI and fund fact sheets for NAV, monthly holdings and official disclosures.
# Final takeaway Treat trailing returns as an output and investigate the portfolio, fees and risk measures to understand how those returns were produced. A short side-by-side review of holdings, fees and risk metrics usually explains why two funds with similar long-term returns can behave very differently going forward.