Why your fund's "1-year return" is lying to you
If your fund app says "23% returns last year," that number applies to a single lump sum invested 12 months ago. But you didn't invest a lump sum. You did SIPs every month. Some at peaks, some at dips. Your actual return is something completely different.
This is why understanding portfolio metrics isn't optional. The headline numbers shown in fund apps are usually marketing-grade, not your-grade.
"There's a difference between what a fund earned and what you earned."
The four metrics worth knowing
Extended Internal Rate of Return
XIRR is the only return number that respects when you put money in and took it out. It treats every SIP, lump sum, and withdrawal as a separate cash flow and gives you the annualised rate that connects them all.
If your XIRR is 14%, that means your portfolio behaved as if every rupee you invested grew at 14% per year — accounting for the fact that recent SIPs had less time to compound than older ones.
Fund's 1-year return: 18%. Your XIRR: 11%. The difference is timing — most of your SIP money went in during the rally, so it didn't capture the full year's gains. XIRR tells the truth.
Compound Annual Growth Rate
CAGR is XIRR's simpler cousin. It assumes a single investment grew steadily for N years. It's perfect for lump sums, useless for SIPs.
If you bought ₹1 lakh of a fund 5 years ago and it's now ₹1.6 lakh, your CAGR is roughly 9.9%. Clean. Done.
Lump sum investment → CAGR. SIPs, top-ups, redemptions → XIRR. Mixed scenarios → always XIRR.
Excess return vs the benchmark
Alpha measures how much extra return your fund earned compared to its benchmark — adjusted for the risk it took. A positive alpha of 2% means the fund beat its benchmark by 2 percentage points after accounting for risk.
Sounds great. The catch: most active funds in India have struggled to deliver consistent positive alpha over 10+ years, especially in the large-cap category. This is why index funds keep gaining ground.
Alpha matters most for active funds you're paying 1%+ to. If your active fund's 5-year alpha is below 1%, you're paying for skill the manager isn't delivering.
Sensitivity to market movements
Beta measures how much your fund moves when the market moves. It's not about returns — it's about volatility relative to the index.
- Beta = 1.0 → moves exactly with the market
- Beta = 1.3 → 30% more volatile than market (rises faster, falls harder)
- Beta = 0.7 → 30% less volatile (smoother ride, often boring)
If you panic when your portfolio falls 25% in a month, you can't hold a beta-1.3 mid-cap fund. Match beta to your stomach, not your spreadsheet.
The supporting cast
Standard Deviation
How much your fund's returns swing around their average. A standard deviation of 18% means in any given year, returns can typically vary by ±18% from the average. Smaller is smoother. Useful for comparing funds in the same category.
Sharpe Ratio
Return per unit of risk taken. The formula is simple: (fund return − risk-free rate) ÷ standard deviation. Higher is better.
- Below 0.5 → not great
- 0.5 to 1.0 → acceptable
- Above 1.0 → strong risk-adjusted performance
R-Squared
How much of the fund's movement is explained by its benchmark. R² of 0.95 means 95% of the fund's returns track the index — meaning you're paying active fees for what's essentially a closet index fund. Look for R² between 0.75–0.90 for a "real" active fund.
Expense Ratio (recap)
The drag on your returns every year. The lower this is, the more of the fund's gross return reaches your account. A 1% expense ratio difference compounds to a real number over 20 years — see Mutual Funds 101.
What actually moves your returns
Most retail investors obsess over the wrong levers. Here's the rough hierarchy of what actually drives long-term portfolio returns, in order of impact:
| Factor | Approx. impact | Your control |
|---|---|---|
| Asset allocation (equity/debt mix) | ~70% | High |
| Investing duration (years invested) | ~15% | High |
| Behaviour during crashes | ~10% | Highest |
| Specific fund selection | ~3–5% | Medium |
| Market timing | ~0% | None worth using |
Notice what's at the top: how much equity vs debt you hold and how long you stay invested. Notice what's near the bottom: which exact fund you picked.
DALBAR's annual studies in the US consistently show that investor returns lag fund returns by 2–4% per year — entirely because of poor entry/exit timing. The pattern in India is similar. Your XIRR will almost always be lower than your fund's CAGR. The gap is the cost of your own emotions.
Reading a portfolio review like a pro
Once a quarter, look at your portfolio with these questions:
- Is my asset allocation still where it should be? If equity has grown to 85% when you wanted 70%, rebalance.
- Has my XIRR diverged badly from the benchmark? A flexi-cap fund that's lagged Nifty 500 by 4% over 3 years deserves a hard look.
- Have any underlying basics changed? Fund manager left? AMC merged? AUM grown 10×? These warrant attention.
- Am I still on track for my goals? If your retirement corpus needs ₹5 Cr in 20 years and you're projected at ₹3.5 Cr, the fix is usually higher contributions, not better funds.
Underperformance for 1 year is normal. 2 years happens to even the best funds. Switching after 12–18 months of lag often means selling at the bottom and rotating to last year's top performer — the textbook recipe for poor returns.
The metrics not worth your time
- NAV (Net Asset Value) — the absolute number doesn't matter. A fund at ₹500 NAV isn't "expensive" vs one at ₹50.
- Day-to-day returns — useless noise unless you're a trader.
- 1-year fund rankings — last year's #1 fund is often the next year's underperformer.
- Star ratings — backward-looking, see Mutual Funds 101.
- Top 10 holdings — interesting, but rarely actionable for retail investors.
- I track XIRR for SIPs, not just fund returns
- My equity-debt mix is within 5% of my target
- I rebalance once a year, not when the market moves
- I judge funds on 5-year+ rolling performance, not 1-year
- My active funds have positive alpha over 5+ years
- I haven't switched funds in panic during a correction
- I know my portfolio's beta and am okay with the volatility
Coming next: Goal-based Planning
Separate plans for retirement, home, and your child's education — done right.