Portfolio Overlap

Investments

Portfolio overlap occurs when multiple mutual funds in your portfolio hold the same underlying stocks. High overlap means you are not actually diversified despite holding multiple funds -- you have just paid multiple expense ratios for effectively the same positions.

In detail

Common high-overlap combinations:nHDFC Top 100 + ICICI Bluechip: 75%+ overlap (both large cap)nHDFC Flexi Cap + Mirae Asset Large Cap: 60%+ overlapnAny two Nifty 50 index funds: 100% overlap (avoid this)nnDesirable low-overlap combinations:nNifty 50 index + Nifty Midcap 150 index: low overlap (different universe)nNifty 50 index + US S&P 500 ETF: near zero overlap (different geography)nLarge cap index + small cap fund: low overlapnnTools to check overlap:nValueResearch.com: Portfolio Overlap toolnMorningstar India: portfolio X-ray featurenGroww/Kuvera: portfolio analysis shows stock-level holdings

Formula

Portfolio Overlap % = Common stocks / Average total stocks of both funds x 100nLow overlap: below 30%. Acceptable: 30-50%. High overlap: above 60%.

Real-life example

🇮🇳 India example

Arun holds: HDFC Top 100 (expense 0.8%) + SBI Large Cap (expense 0.9%) + ICICI Bluechip (expense 0.95%). All are large cap active funds. Overlap among them: 70-80%. Effectively 3 similar portfolios at 3x the expense. Better: replace all 3 with one Nifty 50 index fund at 0.1% expense ratio + add Nifty Midcap 150 for actual diversification. Net saving: 0.7-0.8% expense annually + genuine diversification.

Frequently asked questions

Does high overlap in funds always mean bad portfolio design? ▼

Yes for same-category funds (multiple large-cap active funds). But some overlap is unavoidable and acceptable -- Nifty 50 stocks appear in many indices. Target: each fund in your portfolio should serve a distinct role (e.g., large cap, mid cap, international, debt) with minimum overlap between equity categories.