cumulative return
Cumulative Return is the total change in your money over the whole time you held an investment, added together from start to finish, more than this year.
In plain English
Your uncle who travelled to Canada in 2016 calls during the Christmas gathering and everyone wants to know how his small investment in that Nigerian bank stock has done since he left.
He does not say 'it went up 8 percent this year.' He says 'from when I bought it to today, my money has grown by 65 percent.' That whole stretch, every gain, every dip, all rolled into one number, is his cumulative return.
This is different from the yearly return you hear on the news. A stock can have a poor year, a brilliant year, then a flat year, and none of those single years tell you what actually happened to your pocket over the full period. Cumulative return does that job.
It matters most to people who invest for the long haul rather than the quick flip. Someone in London who has been putting money into a stocks and shares ISA since 2018 does not care only about this year's number. They want to know, across six years, how much richer or poorer that decision has made them.
The same applies at home. If your cooperative society invested in treasury bills and mutual funds five years ago, the useful question at the annual meeting is not 'how did we do last quarter' but 'how did our money grow from day one to now.' That is the story cumulative return tells, and it is often more encouraging, or more sobering, than any single year suggests.
Chidinma put ₦500,000 into a mutual fund in January 2021. By December 2024, her balance had grown to ₦750,000. Her cumulative return over those four years is 50 percent, worked out as the total gain of ₦250,000 divided by the original ₦500,000, multiplied by 100.
Questions people ask
Is cumulative return the same as annual return?
No. Annual return covers just one year, while cumulative return adds up everything that happened across every year you held the investment, from the very first day to the last.
Why does cumulative return sometimes look better than expected even after a bad year?
Because the strong years before or after the bad one are still counted in the total. A rough 2022 can be cancelled out by a strong 2023 and 2024, and cumulative return shows you that combined consider rather than one gloomy snapshot.
How do I calculate my own cumulative return?
Take your current value, subtract your original amount invested, divide that by the original amount, then multiply by 100 to get a percentage. If you added money along the way, a proper calculation should account for those extra contributions too.
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