real rate of return
Real Rate of Return is what your investment actually earned after inflation has taken its bite, showing the true increase in what your money can buy.
In plain English
You check your fixed deposit and see it grew by 15% this year, and you feel like clapping for yourself, until you remember that garri, transport and rent all got more expensive too, some by more than that.
That gap between the shiny percentage on your statement and what actually happened to your buying power is exactly what real rate of return is trying to expose.
It simply takes the return you earned and subtracts inflation for that same period, so you can see whether you truly grew richer or just kept pace, or worse, calmly lost ground while feeling like you gained.
A Nigerian example makes it sharp. Say your money market fund paid you 15% in a year where inflation averaged 20%. On paper you made money, but in real terms you actually lost about 5% of your purchasing power, because prices outran your returns.
For someone in the diaspora sending money home, this matters too. A UK savings account paying 4% feels safe, but if inflation there is running at 6%, the real return is negative, and the same logic applies to any ₦ investment back home once you compare it against Nigeria's inflation rate, not the UK's.
This is why smart investors never celebrate a return number alone. They always ask, return after what inflation, because that is the only number that tells you if your money is actually working or just running on the spot.
You invest ₦1,000,000 and it grows to ₦1,150,000 in a year, a 15% return. If inflation that year was 20%, your real rate of return is roughly negative 5%, meaning your money buys less than it did before, even though the balance looks bigger.
Questions people ask
How do I calculate real rate of return quickly?
A simple estimate is your nominal return minus the inflation rate for the same period. So 15% return minus 20% inflation gives roughly negative 5%. For more precision investors use a slightly different formula that divides rather than subtracts, but the subtraction method is close enough for everyday decisions.
Why does my bank never mention real rate of return?
Because the nominal rate looks better and sells more easily. Banks and fund managers are not lying when they quote 15%, but they are not obligated to remind you that inflation might be eating most or all of it, so that homework falls on you.
Can real rate of return ever be higher than the nominal rate?
Yes, during periods of deflation, when prices are actually falling. It rarely happens in Nigeria, but in some economies prices drop for a stretch, and in that case your buying power grows even faster than your stated return suggests.
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