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Is your portfolio over-diversified? How to achieve the right balance

Diversification is key, but too much of it can affect your returns. Learn how to strike the right balance and build a portfolio that’s tailored to you.

Published on 30 March 2026

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4 min read

It’s important to have a diversified portfolio. Diversification means spreading investments across various asset classes or sectors to prevent you from being over-reliant on the performance of a single investment.

However, you can diversify too much, despite good intentions. This can result in a portfolio made up of numerous investments with overlapping positions. A portfolio like this can be complex to manage and could potentially lead to low returns, so it’s important to strike the right balance.

The problem with over-diversification

While thoughtful diversification reduces risk, adding too many overlapping investments can reduce a portfolio’s overall performance. Here are some important considerations to keep in mind:

1. Diluted returns: When you own too many assets, high-performing investments could be overshadowed and have less influence on your portfolio’s overall growth. For example, if you own 50-plus stocks, a positive performance by one may have little impact on your portfolio’s total return.

2. High costs: More investments mean high transaction fees, management costs or fund expenses. These extra costs reduce your overall returns.

3. Complexity: Tracking and analysing multiple investments can be time-consuming and challenging. This might lead to poor decision-making.

How to avoid over-diversification

  1. 1. Start with asset allocation

    2. Take a close look at what you are investing in e.g. equities, fixed income, gold or other asset classes. The key isn’t to have a bit of everything, but to allocate your money smartly.

  2. 2. Understand correlation

    3. Diversification isn’t just about owning different assets - it’s about choosing assets that behave differently. If all your investments move in the same direction during market swings, they’re likely highly correlated. Look for assets with low correlation to one another to smooth out volatility and reduce overall risk.

  3. 3. Review performance

    4. If your portfolio consistently underperforms market benchmarks, it could be a symptom of either over-diversification (with too many similar holdings diluting returns) or its opposite: concentrating your portfolio on a few high-risk bets.

    Regular reviews of your portfolio will help you identify these patterns and make adjustments. Timely rebalancing will keep your investment plan on track.

  4. 4. Get guidance from an investment adviser

    5. Sometimes, it’s hard to be objective with investment choices. A SEBI Registered Investment Adviser (RIA) is legally bound to give you unbiased advice, so they can help you create a personalised plan with an optimal blend of asset classes to match your investment objectives. As part of their fiduciary duties, RIAs will also monitor your portfolio regularly and rebalance it to optimise risk-adjusted returns.

Bottom line: Diversify with purpose, not just volume

Spreading investments thinly is not the same as effectively spreading risk. A successful diversification strategy involves building a resilient portfolio that is tailored to your investment objectives. A SEBI Registered Investment Adviser (RIA) can provide personalised advice based on your risk tolerance, time horizon and objectives to help achieve the right balance for you.

Disclaimer: This article is for educational purposes only.

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