MMID vs. MFSI

Last updated Aug 1, 2026

MMID (MFS Active Mid Cap ETF) and MFSI (MFS Active International ETF) are both exchange-traded funds - MMID is a Mid Cap Blend Equities fund actively managed by MFS, while MFSI is a Foreign Large Cap Equities fund actively managed by MFS. Both are actively managed. Their 0.62 correlation means they have sometimes moved together and sometimes differently. Both charge a 0.59% expense ratio.

Performance

MMID vs. MFSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Active Mid Cap ETF (MMID) 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, MMID achieves a 7.65% return, which is significantly lower than MFSI's 9.70% return.

MMID

• 1D: 0.03%
• 1M: 1.23%
• 6M: 4.97%
• YTD: 7.65%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

MFSI

• 1D: -0.23%
• 1M: 2.78%
• 6M: 7.40%
• YTD: 9.70%
• 1Y: 21.20%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 19.34%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
MFSI MFS Active International ETF	$6.35M	$6.69M	$6.66M
MMID MFS Active Mid Cap ETF	$6.57K	$9.23K	$17.42K

MMID vs. MFSI - Yearly Performance Comparison

	2026 (YTD)	2025
MMID MFS Active Mid Cap ETF	7.65%	0.62%
MFSI MFS Active International ETF	9.70%	4.43%

Correlation

The correlation between MMID and MFSI is 0.62, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (All Time) Calculated using the full available price history since Sep 24, 2025	0.62

Return for Risk

MMID vs. MFSI — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

MMID

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

MFSI

MFSI Risk / Return Rank: 53
MFSI Sharpe Ratio Rank: 54
MFSI Sortino Ratio Rank: 53
MFSI Omega Ratio Rank: 52
MFSI Calmar Ratio Rank: 50
MFSI Martin Ratio Rank: 57

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

MMID vs. MFSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Active Mid Cap ETF (MMID) 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.

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.

	MMID	MFSI	Difference
Sharpe ratio: Return per unit of total volatility	—	1.32	—
Sortino ratio: Return per unit of downside risk	—	1.90	—
Omega ratio: Gain probability vs. loss probability	—	1.24	—
Calmar ratio: Return relative to maximum drawdown	—	1.80	—
Martin ratio: Return relative to average drawdown	—	6.83	—

Drawdowns

MMID vs. MFSI - Drawdown Comparison

The maximum MMID drawdown since its inception was -7.93%, smaller than the maximum MFSI drawdown of -13.67%. Use the drawdown chart below to compare losses from any high point for MMID and MFSI.

Drawdown Indicators

	MMID	MFSI	Difference
Max Drawdown Largest peak-to-trough decline	-7.93%	-13.67%	+5.74%
Max Drawdown (1Y) Largest decline over 1 year	—	-11.17%	—
Current Drawdown Current decline from peak	-0.77%	-0.23%	-0.54%
Average Drawdown Average peak-to-trough decline	-1.89%	-1.94%	+0.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	2.95%	—

Volatility

Volatility by Period

	MMID	MFSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	4.42%	—
Volatility (6M) Calculated over the trailing 6-month period	—	13.23%	—
Volatility (1Y) Calculated over the trailing 1-year period	13.16%	15.29%	-2.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	13.16%	16.33%	-3.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	13.16%	16.33%	-3.17%

MMID vs. MFSI - Expense Ratio Comparison

Both MMID and MFSI have an expense ratio of 0.59%.

Dividends

MMID vs. MFSI - Dividend Comparison

MMID's dividend yield for the trailing twelve months is around 0.69%, less than MFSI's 0.75% yield.

Position	TTM	2025
MFSI MFS Active International ETF	0.75%	0.81%
MMID MFS Active Mid Cap ETF	0.69%	0.28%

Frequently Asked Questions

Can I hold both MMID and MFSI in my portfolio?

MMID and MFSI have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MMID or MFSI?

Both ETFs have the same 0.59% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MMID or MFSI?

MMID and MFSI have the same expense ratio: 0.59% per year.

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

MFSI has the higher dividend yield at 0.75%, compared with 0.69% for MMID.

What is the main difference between MMID and MFSI?

MMID is categorized as Mid Cap Blend Equities, while MFSI is Foreign Large Cap Equities.