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Learn · risk

Concentration

Share of portfolio in your top N positions. >40% in top 3 is concentrated; <20% is diversified. Concentration boosts returns when right and amplifies pain when wrong.

When you think about your investment portfolio, imagine having all your eggs in one basket. If you're investing heavily in just a few stocks or assets, like putting all your money into just three shares on the Nigerian Stock Exchange (NGX), you're taking a concentrated approach. This means that if those top few investments perform well, your returns can be significant. However, if they don't do well, you could face substantial losses. It's like relying solely on your mom's buka (small restaurant) to feed your entire extended family; if something happens to the buka, the impact is huge.

A diversified portfolio, on the other hand, is like having multiple sources of income. Instead of putting all your money into three stocks, you spread it across many. This way, if one or two investments underperform, the others might still do well, balancing out the overall returns. For example, you might invest in a mix of stocks, bonds, and even real estate. This approach can help reduce risk, similar to how a farmer who grows different crops can still have a good harvest even if one crop fails.

In Nigeria, the Central Bank of Nigeria (CBN) often adjusts the Monetary Policy Rate (MPR), which can affect different investments differently. If you’re heavily invested in certain stocks and the MPR changes, those stocks might be more vulnerable to market fluctuations. On the other hand, a diversified portfolio might be less affected by such changes because it includes a variety of investments. It's like having a well-stocked pantry with different food items; you’re less likely to be affected if the price of one item goes up.

When it comes to taxes, Nigerian investors should be aware of the 10% withholding tax (WHT) on dividends and the 10% capital gains tax (CGT). If you have a concentrated portfolio and earn significant dividends or capital gains, you might end up paying a lot in taxes. With a diversified portfolio, your tax liability might be more manageable because your gains and dividends are spread across different investments. It's similar to paying school fees for multiple children instead of just one; the burden is spread out.

Why it matters: Understanding concentration in your investment portfolio helps you balance the potential for higher returns with the risk of significant losses. By diversifying, you can protect your investments from the ups and downs of the market, much like how diversifying income streams can stabilize your financial health. It’s a smart move to ensure your investments are as resilient as a well-rounded business strategy.

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See also
Diversification Position sizing
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