annualised return

Here is a mistake many people make without knowing it. Your cousin tells you her investment made ₦150,000 in three months, and you immediately compare it to your own investment that made ₦300,000 in a year, and you feel she is winning. But you have just compared two different clocks as if they were the same clock, and that is where the confusion starts.

Returns only mean something when you know the time it took to earn them. ₦150,000 in three months, if that pace continued, could turn into ₦600,000 in a year. Suddenly your cousin's investment looks stronger than yours, even though her raw number was smaller. Annualised return is the tool that fixes this, it takes any return, whether earned in two months or two years, and stretches or compresses it to show what it would look like over a full twelve months.

Say you invest ₦500,000 in a mutual fund in Lagos and after eight months it becomes ₦560,000. That is a 12% return, but only for eight months. To annualise it, you work out what that same growth rate would produce over a full year, and it comes to roughly 18.7%. That 18.7% is the number you should use when comparing this fund to a fixed deposit paying 15% annually, or to a friend's investment that ran for a different length of time.

This matters a lot for Nigerians comparing options across borders too. Someone in London putting money into an ISA for eighteen months needs the annualised figure to compare fairly against a Nigerian treasury bill that matures in ninety one days. Without annualising, you are stacking apples against a half eaten orange and calling it analysis.

The one thing to watch is that annualised return assumes steady, repeatable growth, and markets rarely move in straight lines. A fund that doubled in one lucky month should not be annualised as if that pace will happen twelve times over. Use it to compare fairly, not to dream wildly.