What is Seven Day Yield

Seven day yield is a measure of the annualized yield for a money market mutual fund. It is usually calculated based on the fund’s average seven day distribution. The seven day yield may also be referred to as the seven day annualized return.


Seven day yield is most often calculated for money market funds. This yield includes distributions paid by the fund plus any appreciation over a seven-day period, minus average fees incurred during seven days.

Seven day yield for money market funds can range from 0.5% to 5%. Seven day yield can help to provide an expectation for the future return on an investment. Similar to forward yield its calculation is a projection that typically includes the average distribution from the fund’s most recent payout. Many investors may choose money market funds to hold excess cash in various types of accounts. Retirement accounts and brokerage accounts often allow for the election of a cash deposit sweep into money market funds. The seven day yield is one of the most common metrics provided for money market fund comparisons by brokerage platforms.

The basic calculation is as follows: ((A-B-C)/B) x 365/7.

A = The price at the end of a seven day period plus average weekly distributions.

B = The price at the beginning of a seven day period.

C = Average fees for the week.

365/7 = 52 which represents the number of weeks in a year.

The seven day yield provides investors with an estimate of the yield they can expect over the next year, based on the average payouts of one week. The methodology for the seven day yield can vary.

Seven Day Yield Comparisons

Barron’s provides a list here of the industry’s best money market funds by seven day yield. Barron’s seven day yields are reported with and without compounding. The list shows the industry’s highest yielding money market funds by popular industry categories. Money market categories for investing can include government, prime and tax-free municipals. Tax-free municipals will be exempt from federal tax and also exempt from state tax if the investment corresponds with the investor’s state of residence.

Vanguard Federal Money Market Fund (VMFXX)

The Vanguard Federal Money Market Fund reports the top seven day yield in the government category as of January 3, 2018. It has a simple seven day yield of 1.22% and a compound seven day yield of 1.23%. Its most recent distribution of $0.00097 was paid out January 2, 2018 giving it an average seven day distribution of $0.0002425.

The seven day yield calculation is as follows:

($1+$0.0002425-1-Expenses)/$1 x 365/7 = 1.22%

Investors should be cautious of seven day yield calculations since a fund’s seven day yield can sometimes vary with distributions if an average is not used. The 30 day yield can also be good for comparison since its calculation is a hypothetical annualized return based on payouts from the past 30 days.