Too many mutual funds in your portfolio? Here's when diversification becomes a risk

So, how many funds are too many? And when should investors rethink their portfolios?

Diversification works when each additional investment brings a different source of returns or helps manage portfolio risk. However, adding funds with similar underlying holdings can create duplication rather than meaningful diversification.

"Over-diversification happens when adding another fund does not bring a genuinely different source of returns or risk protection. Investors may own several funds, but if they invest in similar stocks, market-cap segments, sectors or investment styles, the portfolio may only appear diversified. The key is to assess diversification across asset classes, market capitalisation, investment styles, sectors and individual securities. Every fund should serve a purpose, whether it is to provide growth, stability, income or inflation protection. The real question is whether another fund improves the portfolio or simply adds duplication and complexity," said Saurabh Jain.

Over-diversification often creeps into portfolios gradually. As investors accumulate wealth or become interested in new investment themes, they tend to add more schemes without reviewing their existing investments. This can result in multiple funds holding similar stocks.

"Over-diversification is quite common in mutual fund portfolios. Almost every mutual fund scheme is already diversified and holds a reasonably large number of stocks. The problem arises when investors stop reviewing their existing holdings and continue adding newer funds as their investible surplus grows or new themes become attractive. Investors should diversify across asset classes, market caps, investment styles and sectors, while regularly checking portfolio overlap. Their risk appetite and investment horizon should also guide these decisions," said Jitendra Sriram.

Simply owning five or six mutual funds does not guarantee exposure to different parts of the market. Reviewing the underlying holdings can help investors identify whether multiple schemes are investing in the same companies and whether each fund is adding something different to the portfolio.

"Over-diversification happens when adding another fund does not meaningfully improve the portfolio's risk-return profile. For instance, an investor with ₹10 lakh across five equity mutual funds may find that three of these funds have substantial exposure to the same large-cap stocks. Despite holding five funds, the actual portfolio may be less diversified than it appears. Investors should review underlying holdings, category exposure, sector concentration and the role of each fund. Some overlap is normal, but unnecessary duplication without meaningful value is a concern," said Shweta Shastri.

A well-diversified portfolio is not about owning as many mutual fund schemes as possible. It is about ensuring that each investment has a clear role and aligns with the investor's financial goals, risk appetite and investment horizon.

Periodic portfolio reviews can help investors identify overlapping investments, remove unnecessary duplication and ensure that their money is working towards their long-term financial goals.