MFSI vs. MMID

Last updated Jun 24, 2026

MFSI (MFS Active International ETF) and MMID (MFS Active Mid Cap ETF) are both exchange-traded funds - MFSI is a Foreign Large Cap Equities fund actively managed by MFS, while MMID is a Mid Cap Blend Equities fund actively managed by MFS. Both are actively managed. A 0.67 correlation means they provide meaningful diversification when combined. Both charge a 0.59% expense ratio.

Performance

MFSI vs. MMID - Performance Comparison

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

Returns By Period

In the year-to-date period, MFSI achieves a 4.60% return, which is significantly higher than MMID's 3.20% return.

MFSI

• 1D: -1.91%
• 1M: -0.38%
• YTD: 4.60%
• 6M: 4.43%
• 1Y: 16.18%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MMID

• 1D: -0.40%
• 1M: 1.97%
• YTD: 3.20%
• 6M: 2.66%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MFSI vs. MMID - Yearly Performance Comparison

	2026 (YTD)	2025
MFSI MFS Active International ETF	4.60%	4.43%
MMID MFS Active Mid Cap ETF	3.20%	0.62%

Correlation

The correlation between MFSI and MMID is 0.67, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (All Time) Calculated using the full available price history since Sep 24, 2025	0.67

Return for Risk

MFSI vs. MMID — Risk / Return Rank

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

MFSI

MFSI Risk / Return Rank: 33
MFSI Sharpe Ratio Rank: 32
MFSI Sortino Ratio Rank: 31
MFSI Omega Ratio Rank: 31
MFSI Calmar Ratio Rank: 31
MFSI Martin Ratio Rank: 38

MMID

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

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.

MFSI vs. MMID - Risk-Adjusted Trends Comparison

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

	MFSI	MMID	Difference
Sharpe ratio: Return per unit of total volatility	1.07	—	—
Sortino ratio: Return per unit of downside risk	1.57	—	—
Omega ratio: Gain probability vs. loss probability	1.20	—	—
Calmar ratio: Return relative to maximum drawdown	1.45	—	—
Martin ratio: Return relative to average drawdown	5.39	—	—

Drawdowns

MFSI vs. MMID - Drawdown Comparison

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

Drawdown Indicators

	MFSI	MMID	Difference
Max Drawdown Largest peak-to-trough decline	-13.67%	-7.93%	-5.74%
Max Drawdown (1Y) Largest decline over 1 year	-11.17%	—	—
Current Drawdown Current decline from peak	-3.13%	-1.44%	-1.69%
Average Drawdown Average peak-to-trough decline	-1.97%	-2.09%	+0.12%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.01%	—	—

Volatility

Volatility by Period

	MFSI	MMID	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.13%	—	—
Volatility (6M) Calculated over the trailing 6-month period	12.88%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	15.13%	13.55%	+1.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.46%	13.55%	+2.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.46%	13.55%	+2.91%

MFSI vs. MMID - Expense Ratio Comparison

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

Dividends

MFSI vs. MMID - Dividend Comparison

MFSI's dividend yield for the trailing twelve months is around 0.77%, more than MMID's 0.49% yield.

Position	TTM	2025
MFSI MFS Active International ETF	0.77%	0.81%
MMID MFS Active Mid Cap ETF	0.49%	0.28%

Frequently Asked Questions

Can I hold both MFSI and MMID in my portfolio?

MFSI and MMID have a correlation of 0.67, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MFSI or MMID?

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, MFSI or MMID?

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

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

MFSI has the higher dividend yield at 0.77%, compared with 0.49% for MMID.

What is the main difference between MFSI and MMID?

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