Three to Five. That's the Answer.
I know it sounds too simple. But I've seen portfolios with 18 mutual funds that were less diversified than a well-constructed 4-fund portfolio. The number of funds isn't the signal — the spread across asset classes and market caps is.
The Dirty Secret About "Diversification"
Pick any two top-rated large-cap mutual funds — Mirae Asset Large Cap and Axis Bluechip, for example. Now look at their top 10 holdings side by side. You'll find HDFC Bank, Reliance Industries, ICICI Bank, and Infosys in both, at nearly identical weightages. If you hold both, you're not getting more diversification. You're paying two AMCs to own the same portfolio.
True diversification means spreading across different kinds of assets — equity and debt, large-cap and mid-cap, domestic and international — not across multiple funds within the same category. Holding six large-cap funds is concentrated, not diversified.
What a Simple But Complete Portfolio Looks Like
For most investors, three to five funds covers every real need:
Conservative (stable income, short horizon): A Nifty 50 index fund at about 40%, a short-duration debt fund at 40%, and a gold ETF or sovereign gold bond at 20%. Low cost, low drama.
Moderate (salaried, 7–10 year horizon): Nifty 50 index fund at 50%, a mid-cap fund at 20%, and a short-duration debt fund at 30%. This is genuinely the sweet spot for most working professionals.
Aggressive (long horizon, high income, comfortable with volatility): Nifty 50 at 40%, mid-cap at 30%, small-cap at 20%, and an international fund at 10%. Four funds total. The international piece is there for currency diversification, not because global funds always outperform.
The Thing About Expense Ratios
If you hold eight funds and the average expense ratio is 1%, you're paying 1% per year on your entire corpus just in management fees. The Nifty 50 index fund from most fund houses costs 0.1–0.2%. On a ₹50 lakh portfolio, the difference between a 0.15% expense ratio and a 1% expense ratio is roughly ₹42,500 a year. Compounded over 20 years, that's a significant drag.
Finding Out If You Have Overlap Right Now
If you're not sure how much overlap your current portfolio has, upload your holdings to WealthLenseAI — it'll show you exactly which funds are duplicating each other and what the allocation looks like.