How to calculate seven-day yield
The seven-day yield is simple to calculate and does exactly what you might expect. You'll need the price at the end of the designated seven-day window, plus any distributions, the price at the start of the window, and the fees during that week.
Here's the formula:
E = End price plus distributions
S = Start price
F = Fees
Seven-day yield = ((E - S - F) / S) x 365/7
So, if your money market fund account went from $930 to $1,000 this week and you paid 0.4% in fees ($4.00), your formula would look like this:
(($1,000 - $930 - $4) / $930) x 365/7 = 3.70%, which is your seven-day yield.
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