30-day SEC Yield

A standardized yield calculation developed by the SEC to allow fair comparison of bond funds based on a recent 30-day period.

The 30-day SEC yield is a standardized calculation developed by the Securities and Exchange Commission (SEC) to allow investors to make fair, head-to-head comparisons of the yields of bond funds and dividend-paying mutual funds or ETFs. Because bond funds hold many different securities with varying maturities and coupon rates, comparing them without a standard metric can be highly misleading. This metric provides a uniform snapshot of a fund's income potential based on a recent 30-day window. The calculation is based on the net investment income earned by the fund during the trailing 30-day period, after subtracting the fund's expenses. This net income is then divided by the maximum offering price per share on the last day of the period and annualized. By factoring in fund expenses, the 30-day SEC yield represents a more realistic picture of what an investor actually receives compared to gross yield metrics. For retail investors, this metric is highly valuable because it reflects the real earning power of a fund's portfolio over a recent timeframe. It is generally considered a more accurate representation of current yield than the distribution yield or trailing twelve-month (TTM) yield, which can be skewed by historical payments, one-off capital gains distributions, or return of capital. However, investors should note that the SEC yield is a snapshot of the past 30 days and is not a guaranteed future payout rate, especially in volatile interest rate environments.

A bond ETF has a portfolio of bonds that generated gross interest income of $0.45 per share over the last 30 days. The fund incurred expenses of $0.05 per share during this period, leaving a net investment income of $0.40 per share ($0.45 - $0.05). If the maximum offering price of the fund on the last day of the period is $100.00, the 30-day yield is 0.40% ($0.40 / $100.00). When annualized using the SEC's compounding formula, this results in a 30-day SEC yield of approximately 4.85%.