MITTX vs. MRBIX

Last updated Jun 4, 2026

MITTX (MFS Massachusetts Investors Trust) and MRBIX (MFS Total Return Bond Fund) are both mutual funds - MITTX is a Large Cap Blend Equities fund managed by MFS, while MRBIX is a Intermediate Core-Plus Bond fund managed by MFS. Over the past 10 years, MITTX returned 13.61%/yr vs 1.97%/yr for MRBIX. At a correlation of -0.10, they often move in opposite directions. MITTX charges 0.70%/yr vs 0.45%/yr for MRBIX.

Performance

MITTX vs. MRBIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Massachusetts Investors Trust (MITTX) and MFS Total Return Bond Fund (MRBIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MITTX achieves a 8.10% return, which is significantly higher than MRBIX's 0.52% return. Over the past 10 years, MITTX has outperformed MRBIX with an annualized return of 13.61%, while MRBIX has yielded a comparatively lower 1.97% annualized return.

MITTX

• 1D: 0.08%
• 1M: 3.36%
• YTD: 8.10%
• 6M: 8.84%
• 1Y: 20.83%
• 3Y*: 17.69%
• 5Y*: 10.36%
• 10Y*: 13.61%

MRBIX

• 1D: 0.00%
• 1M: 0.55%
• YTD: 0.52%
• 6M: 0.48%
• 1Y: 5.67%
• 3Y*: 4.35%
• 5Y*: 0.23%
• 10Y*: 1.97%

*Multi-year figures are annualized to reflect compound growth (CAGR)

MITTX vs. MRBIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MITTX MFS Massachusetts Investors Trust	8.10%	13.67%	19.69%	19.26%	-16.27%	26.73%	18.72%	31.92%	-5.56%	23.55%
MRBIX MFS Total Return Bond Fund	0.52%	7.35%	1.77%	6.45%	-14.52%	-0.84%	8.83%	9.96%	-1.03%	4.15%

Correlation

The correlation between MITTX and MRBIX is 0.27, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.27
Correlation (3Y) Calculated over the trailing 3-year period	0.22
Correlation (5Y) Calculated over the trailing 5-year period	0.18
Correlation (10Y) Calculated over the trailing 10-year period	0.05
Correlation (All Time) Calculated using the full available price history since Jan 4, 1999	-0.10

The correlation between MITTX and MRBIX shifts across timeframes, from -0.10 (all time) to 0.27 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

MITTX vs. MRBIX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

MITTX

MITTX Risk / Return Rank: 40
MITTX Sharpe Ratio Rank: 42
MITTX Sortino Ratio Rank: 39
MITTX Omega Ratio Rank: 41
MITTX Calmar Ratio Rank: 33
MITTX Martin Ratio Rank: 45

MRBIX

MRBIX Risk / Return Rank: 27
MRBIX Sharpe Ratio Rank: 27
MRBIX Sortino Ratio Rank: 29
MRBIX Omega Ratio Rank: 26
MRBIX Calmar Ratio Rank: 30
MRBIX Martin Ratio Rank: 25

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

MITTX vs. MRBIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Massachusetts Investors Trust (MITTX) and MFS Total Return Bond Fund (MRBIX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	MITTX	MRBIX	Difference
Sharpe ratio: Return per unit of total volatility	1.89	1.48	+0.41
Sortino ratio: Return per unit of downside risk	2.62	2.24	+0.38
Omega ratio: Gain probability vs. loss probability	1.34	1.27	+0.07
Calmar ratio: Return relative to maximum drawdown	2.17	2.06	+0.11
Martin ratio: Return relative to average drawdown	9.43	6.03	+3.40
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MITTX vs. MRBIX - Sharpe Ratio Comparison

The current MITTX Sharpe Ratio is 1.89, which is comparable to the MRBIX Sharpe Ratio of 1.48. The chart below compares the historical Sharpe Ratios of MITTX and MRBIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	MITTX	MRBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.89	1.48	+0.41
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.66	0.04	+0.62
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.79	0.40	+0.39
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.97	-0.54

Drawdowns

MITTX vs. MRBIX - Drawdown Comparison

The maximum MITTX drawdown since its inception was -49.54%, which is greater than MRBIX's maximum drawdown of -19.25%. Use the drawdown chart below to compare losses from any high point for MITTX and MRBIX.

Drawdown Indicators

	MITTX	MRBIX	Difference
Max Drawdown Largest peak-to-trough decline	-49.54%	-19.25%	-30.29%
Max Drawdown (1Y) Largest decline over 1 year	-9.76%	-2.77%	-6.99%
Max Drawdown (3Y) Largest decline over 3 years	-16.10%	-6.29%	-9.81%
Max Drawdown (5Y) Largest decline over 5 years	-23.27%	-19.25%	-4.02%
Max Drawdown (10Y) Largest decline over 10 years	-33.45%	-19.25%	-14.20%
Current Drawdown Current decline from peak	0.00%	-1.29%	+1.29%
Average Drawdown Average peak-to-trough decline	-10.54%	-2.47%	-8.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.24%	0.94%	+1.30%

Volatility

MITTX vs. MRBIX - Volatility Comparison

MFS Massachusetts Investors Trust (MITTX) has a higher volatility of 2.44% compared to MFS Total Return Bond Fund (MRBIX) at 1.35%. This indicates that MITTX's price experiences larger fluctuations and is considered to be riskier than MRBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MITTX	MRBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.44%	1.35%	+1.09%
Volatility (6M) Calculated over the trailing 6-month period	8.56%	2.73%	+5.83%
Volatility (1Y) Calculated over the trailing 1-year period	11.21%	3.86%	+7.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.68%	5.73%	+9.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.21%	4.92%	+12.29%

MITTX vs. MRBIX - Expense Ratio Comparison

MITTX has a 0.70% expense ratio, which is higher than MRBIX's 0.45% expense ratio.

Dividends

MITTX vs. MRBIX - Dividend Comparison

MITTX's dividend yield for the trailing twelve months is around 13.25%, more than MRBIX's 4.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MITTX MFS Massachusetts Investors Trust	13.25%	14.33%	14.47%	10.96%	9.35%	8.66%	8.14%	7.58%	13.49%	7.27%	5.55%	6.02%
MRBIX MFS Total Return Bond Fund	4.17%	4.21%	3.69%	3.42%	2.39%	3.42%	3.00%	3.06%	2.87%	2.65%	3.02%	3.76%

Frequently Asked Questions

Can I hold both MITTX and MRBIX in my portfolio?

MITTX and MRBIX have a correlation of 0.27, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MITTX or MRBIX?

MITTX has higher volatility (2.44%) compared to MRBIX (1.35%). In terms of maximum drawdown, MITTX dropped -49.54% vs MRBIX's -19.25%.

Which has better risk-adjusted returns?

MITTX currently has the higher Sharpe Ratio (1.89 vs 1.48), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.