MFSM vs. MFSI

Last updated Jun 3, 2026

MFSM (MFS Active Intermediate Muni Bond ETF) and MFSI (MFS Active International ETF) are both exchange-traded funds - MFSM is a Municipal Bonds fund actively managed by MFS, while MFSI is a Foreign Large Cap Equities fund actively managed by MFS. Both are actively managed. Over the past year, MFSM returned 7.56% vs 18.65% for MFSI. At a 0.25 correlation, their price movements are largely independent. MFSM charges 0.34%/yr vs 0.59%/yr for MFSI.

Performance

MFSM vs. MFSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Active Intermediate Muni Bond ETF (MFSM) and MFS Active International ETF (MFSI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MFSM achieves a 1.76% return, which is significantly lower than MFSI's 7.98% return.

MFSM

• 1D: 0.11%
• 1M: 0.64%
• YTD: 1.76%
• 6M: 2.32%
• 1Y: 7.56%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MFSI

• 1D: 0.83%
• 1M: 5.05%
• YTD: 7.98%
• 6M: 10.73%
• 1Y: 18.65%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MFSM vs. MFSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024
MFSM MFS Active Intermediate Muni Bond ETF	1.76%	5.25%	-1.30%
MFSI MFS Active International ETF	7.98%	26.43%	-4.21%

Correlation

The correlation between MFSM and MFSI is 0.32, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.32
Correlation (All Time) Calculated using the full available price history since Dec 6, 2024	0.25

Return for Risk

MFSM vs. MFSI — Risk / Return Rank

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

MFSM

MFSM Risk / Return Rank: 76
MFSM Sharpe Ratio Rank: 85
MFSM Sortino Ratio Rank: 90
MFSM Omega Ratio Rank: 91
MFSM Calmar Ratio Rank: 55
MFSM Martin Ratio Rank: 58

MFSI

MFSI Risk / Return Rank: 36
MFSI Sharpe Ratio Rank: 35
MFSI Sortino Ratio Rank: 34
MFSI Omega Ratio Rank: 34
MFSI Calmar Ratio Rank: 36
MFSI Martin Ratio Rank: 41

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.

MFSM vs. MFSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Active Intermediate Muni Bond ETF (MFSM) and MFS Active International ETF (MFSI). 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.

	MFSM	MFSI	Difference
Sharpe ratio Return per unit of total volatility	2.84	1.29	+1.56
Sortino ratio Return per unit of downside risk	4.35	1.86	+2.49
Omega ratio Gain probability vs. loss probability	1.62	1.23	+0.39
Calmar ratio Return relative to maximum drawdown	2.80	1.79	+1.01
Martin ratio Return relative to average drawdown	10.40	6.71	+3.69
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MFSM vs. MFSI - Sharpe Ratio Comparison

The current MFSM Sharpe Ratio is 2.84, which is higher than the MFSI Sharpe Ratio of 1.29. The chart below compares the historical Sharpe Ratios of MFSM and MFSI, 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

	MFSM	MFSI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.84	1.29	+1.56
Sharpe Ratio (All Time) Calculated using the full available price history	1.12	1.23	-0.11

Drawdowns

MFSM vs. MFSI - Drawdown Comparison

The maximum MFSM drawdown since its inception was -3.86%, smaller than the maximum MFSI drawdown of -13.67%. Use the drawdown chart below to compare losses from any high point for MFSM and MFSI.

Drawdown Indicators

	MFSM	MFSI	Difference
Max Drawdown Largest peak-to-trough decline	-3.86%	-13.67%	+9.81%
Max Drawdown (1Y) Largest decline over 1 year	-2.65%	-11.17%	+8.52%
Current Drawdown Current decline from peak	-0.49%	0.00%	-0.49%
Average Drawdown Average peak-to-trough decline	-0.88%	-1.97%	+1.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.71%	2.98%	-2.27%

Volatility

MFSM vs. MFSI - Volatility Comparison

The current volatility for MFS Active Intermediate Muni Bond ETF (MFSM) is 0.93%, while MFS Active International ETF (MFSI) has a volatility of 4.72%. This indicates that MFSM experiences smaller price fluctuations and is considered to be less risky than MFSI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFSM	MFSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.93%	4.72%	-3.79%
Volatility (6M) Calculated over the trailing 6-month period	1.97%	12.11%	-10.14%
Volatility (1Y) Calculated over the trailing 1-year period	2.67%	14.60%	-11.93%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.45%	16.31%	-12.86%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.45%	16.31%	-12.86%

MFSM vs. MFSI - Expense Ratio Comparison

MFSM has a 0.34% expense ratio, which is lower than MFSI's 0.59% expense ratio.

Dividends

MFSM vs. MFSI - Dividend Comparison

MFSM's dividend yield for the trailing twelve months is around 3.55%, more than MFSI's 0.75% yield.

Position	TTM	2025	2024
MFSI MFS Active International ETF	0.75%	0.81%	0.00%
MFSM MFS Active Intermediate Muni Bond ETF	3.55%	3.53%	0.23%

Frequently Asked Questions

Can I hold both MFSM and MFSI in my portfolio?

MFSM and MFSI have a correlation of 0.32, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MFSM or MFSI?

MFSI has higher volatility (4.72%) compared to MFSM (0.93%). In terms of maximum drawdown, MFSM dropped -3.86% vs MFSI's -13.67%.

Which ETF is better, MFSM or MFSI?

On 1-year performance, MFSI leads with 18.65% vs 7.56% for MFSM. On fees, MFSM is cheaper at 0.34% per year. On volatility, MFSM has been the lower-risk option at 0.93%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MFSM or MFSI?

Over the 1-year period, MFSI has performed better with a 18.65% return vs 7.56%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MFSM or MFSI?

MFSM is cheaper with a 0.34% expense ratio, compared with 0.59% for MFSI.

Which ETF pays a higher dividend yield, MFSM or MFSI?

MFSM has the higher dividend yield at 3.55%, compared with 0.75% for MFSI.

What is the main difference between MFSM and MFSI?

MFSM is categorized as Municipal Bonds, while MFSI is Foreign Large Cap Equities. Their fees differ too: 0.34% for MFSM and 0.59% for MFSI.

Which has better risk-adjusted returns?

MFSM currently has the higher Sharpe Ratio (2.84 vs 1.29), 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.