MGBLX vs. MITTX

Last updated Jun 23, 2026

MGBLX (MFS Global Opportunistic Bond Fund Class R2) and MITTX (MFS Massachusetts Investors Trust) are both mutual funds - MGBLX is a Global Bonds fund tracking the Bloomberg Global Aggregate Index (USD Hedged), while MITTX is a Large Cap Blend Equities fund managed by MFS. Over the past 10 years, MGBLX returned 1.53%/yr vs 13.71%/yr for MITTX. At a 0.10 correlation, their price movements are largely independent. MGBLX charges 1.19%/yr vs 0.70%/yr for MITTX.

Performance

MGBLX vs. MITTX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Global Opportunistic Bond Fund Class R2 (MGBLX) and MFS Massachusetts Investors Trust (MITTX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MGBLX achieves a 0.68% return, which is significantly lower than MITTX's 7.77% return. Over the past 10 years, MGBLX has underperformed MITTX with an annualized return of 1.53%, while MITTX has yielded a comparatively higher 13.71% annualized return.

MGBLX

• 1D: 0.00%
• 1M: 1.15%
• YTD: 0.68%
• 6M: 1.22%
• 1Y: 4.04%
• 3Y*: 4.31%
• 5Y*: 0.42%
• 10Y*: 1.53%

MITTX

• 1D: 0.95%
• 1M: 0.76%
• YTD: 7.77%
• 6M: 7.46%
• 1Y: 20.45%
• 3Y*: 16.64%
• 5Y*: 10.47%
• 10Y*: 13.71%

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

MGBLX vs. MITTX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGBLX MFS Global Opportunistic Bond Fund Class R2	0.68%	5.38%	1.81%	7.69%	-11.57%	-3.48%	10.52%	7.91%	-2.66%	7.22%
MITTX MFS Massachusetts Investors Trust	7.77%	13.67%	19.69%	19.26%	-16.27%	26.73%	18.72%	31.92%	-5.56%	23.55%

Correlation

The correlation between MGBLX and MITTX is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.34
Correlation (3Y) Calculated over the trailing 3-year period	0.21
Correlation (5Y) Calculated over the trailing 5-year period	0.20
Correlation (10Y) Calculated over the trailing 10-year period	0.09
Correlation (All Time) Calculated using the full available price history since Jun 1, 2010	0.10

Over the past year, MGBLX and MITTX have become more correlated (0.34) than their long-term average of 0.10, meaning their price movements have been converging.

Return for Risk

MGBLX vs. MITTX — Risk / Return Rank

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

MGBLX

MGBLX Risk / Return Rank: 18
MGBLX Sharpe Ratio Rank: 20
MGBLX Sortino Ratio Rank: 22
MGBLX Omega Ratio Rank: 20
MGBLX Calmar Ratio Rank: 15
MGBLX Martin Ratio Rank: 14

MITTX

MITTX Risk / Return Rank: 39
MITTX Sharpe Ratio Rank: 40
MITTX Sortino Ratio Rank: 38
MITTX Omega Ratio Rank: 40
MITTX Calmar Ratio Rank: 34
MITTX Martin Ratio Rank: 45

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.

MGBLX vs. MITTX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Global Opportunistic Bond Fund Class R2 (MGBLX) and MFS Massachusetts Investors Trust (MITTX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	MGBLX	MITTX	Difference
Sharpe ratio: Return per unit of total volatility	1.19	1.73	-0.54
Sortino ratio: Return per unit of downside risk	1.82	2.38	-0.56
Omega ratio: Gain probability vs. loss probability	1.22	1.31	-0.09
Calmar ratio: Return relative to maximum drawdown	1.25	2.07	-0.82
Martin ratio: Return relative to average drawdown	3.64	8.88	-5.24

MGBLX vs. MITTX - Sharpe Ratio Comparison

The current MGBLX Sharpe Ratio is 1.19, which is lower than the MITTX Sharpe Ratio of 1.73. The chart below compares the historical Sharpe Ratios of MGBLX and MITTX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MGBLX vs. MITTX - Drawdown Comparison

The maximum MGBLX drawdown since its inception was -18.71%, smaller than the maximum MITTX drawdown of -49.54%. Use the drawdown chart below to compare losses from any high point for MGBLX and MITTX.

Drawdown Indicators

	MGBLX	MITTX	Difference
Max Drawdown Largest peak-to-trough decline	-18.71%	-49.54%	+30.83%
Max Drawdown (1Y) Largest decline over 1 year	-3.25%	-9.76%	+6.51%
Max Drawdown (3Y) Largest decline over 3 years	-5.74%	-16.10%	+10.36%
Max Drawdown (5Y) Largest decline over 5 years	-17.10%	-23.27%	+6.17%
Max Drawdown (10Y) Largest decline over 10 years	-18.71%	-33.45%	+14.74%
Current Drawdown Current decline from peak	-1.08%	-0.39%	-0.69%
Average Drawdown Average peak-to-trough decline	-6.54%	-10.53%	+3.99%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.11%	2.27%	-1.16%

Volatility

MGBLX vs. MITTX - Volatility Comparison

The current volatility for MFS Global Opportunistic Bond Fund Class R2 (MGBLX) is 0.98%, while MFS Massachusetts Investors Trust (MITTX) has a volatility of 4.29%. This indicates that MGBLX experiences smaller price fluctuations and is considered to be less risky than MITTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGBLX	MITTX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.98%	4.29%	-3.31%
Volatility (6M) Calculated over the trailing 6-month period	2.81%	9.34%	-6.53%
Volatility (1Y) Calculated over the trailing 1-year period	3.41%	11.72%	-8.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.30%	15.77%	-11.47%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.65%	17.24%	-12.59%

MGBLX vs. MITTX - Expense Ratio Comparison

MGBLX has a 1.19% expense ratio, which is higher than MITTX's 0.70% expense ratio.

Dividends

MGBLX vs. MITTX - Dividend Comparison

MGBLX's dividend yield for the trailing twelve months is around 4.24%, less than MITTX's 13.29% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MGBLX MFS Global Opportunistic Bond Fund Class R2	4.24%	4.01%	2.53%	1.55%	2.99%	4.72%	3.15%	1.81%	1.66%	1.08%	1.15%	1.63%
MITTX MFS Massachusetts Investors Trust	13.29%	14.33%	14.47%	10.96%	9.35%	8.66%	8.14%	7.58%	13.49%	7.27%	5.55%	6.02%

Frequently Asked Questions

Can I hold both MGBLX and MITTX in my portfolio?

MGBLX and MITTX have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MGBLX or MITTX?

MITTX has higher volatility (4.29%) compared to MGBLX (0.98%). In terms of maximum drawdown, MGBLX dropped -18.71% vs MITTX's -49.54%.

Which has better risk-adjusted returns?

MITTX currently has the higher Sharpe Ratio (1.73 vs 1.19), 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.