iShares Total U.S. Stock Market Index Fund Investor A Shares (BASMX)

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The chart shows the growth of an initial investment of $10,000 in iShares Total U.S. Stock Market Index Fund Investor A Shares, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.

iShares Total U.S. Stock Market Index Fund Investor A Shares (BASMX) has returned -6.77% so far this year and 14.36% over the past 12 months. Looking at the last ten years, BASMX has achieved an annualized return of 12.98%, outperforming the S&P 500 Index benchmark, which averaged 12.16% per year.

Based on dividend-adjusted daily data since Jan 4, 2016, BASMX's average daily return is +0.06%, while the average monthly return is +1.13%. At this rate, your investment would double in approximately 5.1 years.

Historically, 69% of months were positive and 31% were negative. The best month was Apr 2020 with a return of +13.0%, while the worst month was Mar 2020 at -13.8%. The longest winning streak lasted 10 consecutive months, and the longest losing streak was 3 months.

On a daily basis, BASMX closed higher 53% of trading days. The best single day was Apr 9, 2025 with a return of +9.6%, while the worst single day was Mar 16, 2020 at -12.3%.

iShares Total U.S. Stock Market Index Fund Investor A Shares has an annualized alpha of 0.95%, beta of 1.01, and R² of 0.99 versus S&P 500 Index. Calculated based on daily prices since January 05, 2016.

• With beta of 1.01 and R² of 0.99, this fund moves broadly in line with S&P 500 Index — much of its variation is explained by market exposure rather than independent behavior.

BASMX has an expense ratio of 0.33%, placing it in the medium range.

BASMX ranks 40 for risk / return — on par with similar mutual funds. You're getting a typical balance of risk and reward. Not a standout, but not a red flag either — a reasonable choice if other factors align with your goals.

The table below present risk-adjusted performance metrics for iShares Total U.S. Stock Market Index Fund Investor A Shares (BASMX) and compare them to a chosen benchmark (S&P 500 Index).

iShares Total U.S. Stock Market Index Fund Investor A Shares provided a 0.92% dividend yield over the last twelve months, with an annual payout of $0.27 per share.

The table displays the monthly dividend distributions for iShares Total U.S. Stock Market Index Fund Investor A 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 iShares Total U.S. Stock Market Index Fund Investor A 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 iShares Total U.S. Stock Market Index Fund Investor A Shares was 34.95%, occurring on Mar 23, 2020. Recovery took 99 trading sessions.

The current iShares Total U.S. Stock Market Index Fund Investor A Shares drawdown is 8.92%.

The chart below shows the rolling one-month volatility.