BRSM vs. MMID

Last updated Jul 8, 2026

BRSM (MFS Blended Research Small-Mid Cap ETF) and MMID (MFS Active Mid Cap ETF) are both Mid Cap Blend Equities funds from MFS. Both are actively managed. A 0.60 correlation means they provide meaningful diversification when combined. BRSM charges 0.38%/yr vs 0.59%/yr for MMID.

Performance

BRSM vs. MMID - Performance Comparison

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

Returns By Period

BRSM

• 1D: -0.82%
• 1M: 5.09%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

MMID

• 1D: 0.12%
• 1M: 4.43%
• 6M: 3.75%
• YTD: 6.48%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

BRSM vs. MMID - Yearly Performance Comparison

	2026 (YTD)
BRSM MFS Blended Research Small-Mid Cap ETF	2.65%
MMID MFS Active Mid Cap ETF	4.10%

Correlation

The correlation between BRSM and MMID is 0.60, 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 Jun 4, 2026	0.60

Return for Risk

BRSM vs. MMID - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Blended Research Small-Mid Cap ETF (BRSM) 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.

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

Drawdowns

BRSM vs. MMID - Drawdown Comparison

The maximum BRSM drawdown since its inception was -3.25%, smaller than the maximum MMID drawdown of -7.93%. Use the drawdown chart below to compare losses from any high point for BRSM and MMID.

Drawdown Indicators

	BRSM	MMID	Difference
Max Drawdown Largest peak-to-trough decline	-3.25%	-7.93%	+4.68%
Current Drawdown Current decline from peak	-1.52%	0.00%	-1.52%
Average Drawdown Average peak-to-trough decline	-0.89%	-2.00%	+1.11%

Volatility

Volatility by Period

	BRSM	MMID	Difference
Volatility (1Y) Calculated over the trailing 1-year period	19.99%	13.31%	+6.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.99%	13.31%	+6.68%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.99%	13.31%	+6.68%

BRSM vs. MMID - Expense Ratio Comparison

BRSM has a 0.38% expense ratio, which is lower than MMID's 0.59% expense ratio.

Dividends

BRSM vs. MMID - Dividend Comparison

BRSM has not paid dividends to shareholders, while MMID's dividend yield for the trailing twelve months is around 0.69%.

Position	TTM	2025
BRSM MFS Blended Research Small-Mid Cap ETF	0.00%	0.00%
MMID MFS Active Mid Cap ETF	0.69%	0.28%

Frequently Asked Questions

Can I hold both BRSM and MMID in my portfolio?

BRSM and MMID have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, BRSM or MMID?

On fees, BRSM is cheaper at 0.38% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, BRSM or MMID?

BRSM is cheaper with a 0.38% expense ratio, compared with 0.59% for MMID.

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

MMID has the higher dividend yield at 0.69%, compared with 0.00% for BRSM.

What is the main difference between BRSM and MMID?

Their fees differ too: 0.38% for BRSM and 0.59% for MMID.