Vanguard Mortgage-Backed Securities Index Fund Institutional Shares (VMBIX)

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Vanguard Mortgage-Backed Securities Index Fund Institutional Shares (VMBIX) is up 1.1% since the beginning of the year. VMBIX is currently trading at $25 per share. Investors who bought $1,000 worth of VMBIX shares 5 years ago would now be looking at an investment worth $1,033.

Vanguard Mortgage-Backed Securities Index Fund Institutional Shares (VMBIX) has returned 1.06% so far this year and 6.22% over the past 12 months. Over the last ten years, VMBIX has returned 1.42% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.

Based on dividend-adjusted daily data since Nov 23, 2009, VMBIX's average daily return is +0.01%, while the average monthly return is +0.18%. At this rate, an investment would double in approximately 32.1 years.

Historically, 62% of months were positive and 38% were negative. The best month was Nov 2023 with a return of +5.3%, while the worst month was Sep 2022 at -5.1%. The longest winning streak lasted 13 consecutive months, and the longest losing streak was 9 months.

On a daily basis, VMBIX closed higher 49% of trading days. The best single day was Nov 10, 2022 with a return of +2.5%, while the worst single day was Jun 13, 2022 at -1.9%.

Vanguard Mortgage-Backed Securities Index Fund Institutional Shares has an annualized alpha of 2.06%, beta of 0.01, and R2 of 0.00 versus S&P 500 Index. Calculated based on daily prices since November 23, 2009.

• This fund participates in less of S&P 500 Index's moves in both directions, but captures a larger share of gains (9.23%) than losses (7.01%) - typical of diversified or defensive assets.
• Beta of 0.01 may look defensive, but with R2 of 0.00 this fund is largely uncorrelated with S&P 500 Index - low beta reflects independence, not downside protection. See the Volatility section for a true picture of this fund's risk.
• R2 of 0.00 means this fund moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.

VMBIX has an expense ratio of 0.05%, which is considered low.

VMBIX ranks 40 for risk / return — below 40% of mutual funds on our site. The returns aren't fully compensating for the risk involved. This isn't necessarily a dealbreaker, but factor it into your decision — especially if you're risk-averse.

Vanguard Mortgage-Backed Securities Index Fund Institutional Shares provided a 4.17% dividend yield over the last twelve months, with an annual payout of $1.06 per share. The fund has been increasing its distributions for 4 consecutive years.

The table displays the monthly dividend distributions for Vanguard Mortgage-Backed Securities Index Fund Institutional Shares. The dividends shown in the table have been adjusted to account for any splits that may have occurred.

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.

The table below displays the maximum drawdowns of the Vanguard Mortgage-Backed Securities Index Fund Institutional Shares. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the Vanguard Mortgage-Backed Securities Index Fund Institutional Shares was 17.44%, occurring on Oct 24, 2022. Recovery took 744 trading sessions.

The current Vanguard Mortgage-Backed Securities Index Fund Institutional Shares drawdown is 0.96%.

The chart below shows the rolling one-month volatility.