Investor Corner/Building and judging a portfolio/Evaluating Funds
3.3.2 Portfolio Overlap
Portfolio overlap happens when multiple funds hold many of the same underlying stocks. High overlap quietly reduces true diversification, even while a portfolio appears well spread across several different fund names.
Why overlap happens so easily
Large cap and flexi cap funds across different AMCs frequently gravitate toward a similar universe of the most well-known, heavily researched large companies. Two funds that look completely different by name, category, or AMC can still end up sharing a large proportion of their top holdings, simply because both managers are drawing conclusions from a broadly similar pool of attractive large companies.
Why this matters for diversification and cost
If two funds share 70% of their portfolio by weight, holding both is functionally closer to holding one larger fund than to holding two genuinely different, diversifying strategies, while still paying two separate sets of expense ratios for that largely duplicated exposure. The intended diversification benefit of adding a second fund is significantly diminished by high overlap.
Checking your own portfolio
Comparing the top holdings lists across the funds you hold, particularly within similar categories, is a worthwhile exercise before adding yet another fund in the same space, since a genuinely diversifying addition should look meaningfully different from what is already held rather than largely duplicating it.
How PriLytics helps. PriLytics shows the true underlying composition of every fund you hold in one consolidated view, making overlap easy to spot rather than something buried across separate factsheets. See your true asset allocation.