MFS Total Return Bond Fund (MRBIX)

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The chart shows the growth of an initial investment of $10,000 in MFS Total Return Bond Fund, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.

MFS Total Return Bond Fund (MRBIX) has returned -0.47% so far this year and 3.94% over the past 12 months. Over the last ten years, MRBIX has returned 2.00% per year, falling short of the S&P 500 Index benchmark, which averaged 12.16% annually.

Based on dividend-adjusted daily data since Dec 31, 1998, MRBIX's average daily return is +0.02%, while the average monthly return is +0.36%. At this rate, your investment would double in approximately 16.1 years.

Historically, 64% of months were positive and 36% were negative. The best month was Nov 2023 with a return of +4.8%, while the worst month was Oct 2008 at -6.0%. The longest winning streak lasted 10 consecutive months, and the longest losing streak was 5 months.

On a daily basis, MRBIX closed higher 44% of trading days. The best single day was Nov 10, 2022 with a return of +2.0%, while the worst single day was Mar 18, 2020 at -3.2%.

MFS Total Return Bond Fund has an annualized alpha of 4.50%, beta of -0.02, and R² of 0.01 versus S&P 500 Index. Calculated based on daily prices since January 04, 1999.

• This fund participates in less of S&P 500 Index's moves in both directions, but captures a larger share of gains (15.90%) than losses (1.70%) — typical of diversified or defensive assets.
• Beta of -0.02 may look defensive, but with R² of 0.01 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 0.01 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.

MRBIX has an expense ratio of 0.45%, placing it in the medium range.

MRBIX ranks 58 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 MFS Total Return Bond Fund (MRBIX) and compare them to a chosen benchmark (S&P 500 Index).

MFS Total Return Bond Fund provided a 3.89% dividend yield over the last twelve months, with an annual payout of $0.37 per share. The fund has been increasing its distributions for 3 consecutive years.

The table displays the monthly dividend distributions for MFS Total Return Bond Fund. 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 MFS Total Return Bond Fund. 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 MFS Total Return Bond Fund was 19.25%, occurring on Oct 24, 2022. Recovery took 838 trading sessions.

The current MFS Total Return Bond Fund drawdown is 2.25%.

The chart below shows the rolling one-month volatility.