Why Kenyan Portfolios Are Less Diversified Than They Look

A portfolio of twelve NSE-listed companies feels diversified. Twelve names, several sectors, a mix of large and mid caps. But diversification is not a count of holdings — it is a measure of how independently those holdings behave.

On a market the size of the NSE, they rarely behave independently at all. The same macroeconomic conditions, the same currency, the same regulatory environment and frequently the same handful of institutional buyers drive all of them.

What correlation actually does

When holdings move together, adding more of them reduces very little risk. You feel diversified because you own many things; you are exposed because those things share one underlying driver.

This is not an argument against local investing. It is an argument for being honest about what your local allocation is doing and what it is not.

What genuine diversification requires

• Exposure to economies that are not driven by the same conditions as yours
• Sectors that are structurally absent from your home market — large-scale technology being the obvious example
• Currency exposure that is deliberate and sized, rather than accidental
• A willingness to hold something that underperforms your home market for years at a time

That last point is where most investors struggle. Diversification only works if you keep holding the part that is currently disappointing you. If you sell it when it lags, you have paid for insurance and then cancelled the policy.

The practical question is not whether to diversify offshore, but how much, through which structures, and at what cost. Those are answerable questions, and they are worth answering before the next market cycle answers them for you.