Invest Ksh 250,000 in Old Mutual MMF for 15 years.
At Old Mutual Money Market Fund's current net yield of 8.21% (after Kenya's 15% withholding tax), a Ksh 250,000 deposit grows to about Ksh 856,473 after 15 years — about Ksh 606,473 in interest, assuming daily compounding and no withdrawals.
Final balance
Ksh 856,473
3.43× your deposit
Deposited
Ksh 250,000
One-off, no withdrawals
Interest earned
Ksh 606,473
At 8.21% net p.a.
Year by year
vs keeping it in a bank savings account
The same Ksh 250,000 at Credit Bank's deposit rate of 12.68% would grow to about Ksh 1,658,191 over the same 15 years — that's -Ksh 801,718 less than Old Mutual Money Market Fund.