For non-Vanguard funds, yield is defined as a fund's annualized current rate of investment income, calculated with a Securities and Exchange Commission formula that includes the fund's net income (based on the yield to maturity of each bond it holds), the average number of outstanding fund shares during the 30-day period reported by Morningstar, and the maximum offering price per share on the last day of the period. The data is provided by Morningstar and is only as current as the information supplied to Morningstar by third parties. The yield for a money market fund more closely reflects the current earnings of the fund than its total return.
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