MFSM vs. ENFR

Last updated Jun 24, 2026

MFSM (MFS Active Intermediate Muni Bond ETF) and ENFR (Alerian Energy Infrastructure ETF) are both exchange-traded funds - MFSM is a Municipal Bonds fund actively managed by MFS, while ENFR is a Energy Equities fund tracking the Alerian Midstream Energy Select Index. MFSM is actively managed, while ENFR is passively managed. Over the past year, MFSM returned 6.90% vs 27.76% for ENFR. At a correlation of -0.07, they often move in opposite directions. MFSM charges 0.34%/yr vs 0.35%/yr for ENFR.

Performance

MFSM vs. ENFR - Performance Comparison

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

Returns By Period

In the year-to-date period, MFSM achieves a 1.97% return, which is significantly lower than ENFR's 24.93% return.

MFSM

• 1D: -0.10%
• 1M: 1.38%
• YTD: 1.97%
• 6M: 2.31%
• 1Y: 6.90%
• 3Y*: —
• 5Y*: —
• 10Y*: —

ENFR

• 1D: 1.51%
• 1M: -4.52%
• YTD: 24.93%
• 6M: 25.03%
• 1Y: 27.76%
• 3Y*: 28.90%
• 5Y*: 20.07%
• 10Y*: 11.98%

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

MFSM vs. ENFR - Yearly Performance Comparison

	2026 (YTD)	2025	2024
MFSM MFS Active Intermediate Muni Bond ETF	1.97%	5.25%	-1.14%
ENFR Alerian Energy Infrastructure ETF	24.93%	5.88%	-3.05%

Correlation

The correlation between MFSM and ENFR is -0.19, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.19
Correlation (All Time) Calculated using the full available price history since Dec 5, 2024	-0.07

The correlation between MFSM and ENFR shifts across timeframes, from -0.19 (1 year) to -0.07 (all time), reflecting how their relationship changes across market environments.

Return for Risk

MFSM vs. ENFR — Risk / Return Rank

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

MFSM

MFSM Risk / Return Rank: 78
MFSM Sharpe Ratio Rank: 89
MFSM Sortino Ratio Rank: 92
MFSM Omega Ratio Rank: 93
MFSM Calmar Ratio Rank: 58
MFSM Martin Ratio Rank: 59

ENFR

ENFR Risk / Return Rank: 57
ENFR Sharpe Ratio Rank: 59
ENFR Sortino Ratio Rank: 57
ENFR Omega Ratio Rank: 54
ENFR Calmar Ratio Rank: 67
ENFR Martin Ratio Rank: 50

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. ENFR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Active Intermediate Muni Bond ETF (MFSM) and Alerian Energy Infrastructure ETF (ENFR). 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.

	MFSM	ENFR	Difference
Sharpe ratio: Return per unit of total volatility	2.65	1.88	+0.77
Sortino ratio: Return per unit of downside risk	4.05	2.59	+1.46
Omega ratio: Gain probability vs. loss probability	1.57	1.32	+0.25
Calmar ratio: Return relative to maximum drawdown	2.61	3.23	-0.61
Martin ratio: Return relative to average drawdown	9.61	8.24	+1.37

MFSM vs. ENFR - Sharpe Ratio Comparison

The current MFSM Sharpe Ratio is 2.65, which is higher than the ENFR Sharpe Ratio of 1.88. The chart below compares the historical Sharpe Ratios of MFSM and ENFR, 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

MFSM vs. ENFR - Drawdown Comparison

The maximum MFSM drawdown since its inception was -3.86%, smaller than the maximum ENFR drawdown of -68.28%. Use the drawdown chart below to compare losses from any high point for MFSM and ENFR.

Drawdown Indicators

	MFSM	ENFR	Difference
Max Drawdown Largest peak-to-trough decline	-3.86%	-68.28%	+64.42%
Max Drawdown (1Y) Largest decline over 1 year	-2.65%	-8.64%	+5.99%
Max Drawdown (3Y) Largest decline over 3 years	—	-15.58%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-20.29%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-62.64%	—
Current Drawdown Current decline from peak	-0.28%	-4.71%	+4.43%
Average Drawdown Average peak-to-trough decline	-0.86%	-15.94%	+15.08%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.72%	3.38%	-2.66%

Volatility

MFSM vs. ENFR - Volatility Comparison

The current volatility for MFS Active Intermediate Muni Bond ETF (MFSM) is 0.72%, while Alerian Energy Infrastructure ETF (ENFR) has a volatility of 5.69%. This indicates that MFSM experiences smaller price fluctuations and is considered to be less risky than ENFR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MFSM	ENFR	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.72%	5.69%	-4.97%
Volatility (6M) Calculated over the trailing 6-month period	2.01%	11.60%	-9.59%
Volatility (1Y) Calculated over the trailing 1-year period	2.62%	14.86%	-12.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.40%	19.25%	-15.85%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.40%	24.68%	-21.28%

MFSM vs. ENFR - Expense Ratio Comparison

MFSM has a 0.34% expense ratio, which is lower than ENFR's 0.35% expense ratio.

Dividends

MFSM vs. ENFR - Dividend Comparison

MFSM's dividend yield for the trailing twelve months is around 3.55%, less than ENFR's 4.02% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ENFR Alerian Energy Infrastructure ETF	4.02%	4.77%	4.41%	5.48%	5.23%	7.86%	7.57%	5.81%	3.98%	2.98%	3.31%	3.34%
MFSM MFS Active Intermediate Muni Bond ETF	3.55%	3.53%	0.23%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MFSM and ENFR in my portfolio?

MFSM and ENFR have a correlation of -0.19, 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 ENFR?

ENFR has higher volatility (5.69%) compared to MFSM (0.72%). In terms of maximum drawdown, MFSM dropped -3.86% vs ENFR's -68.28%.

Which ETF is better, MFSM or ENFR?

On 1-year performance, ENFR leads with 27.76% vs 6.90% for MFSM. On fees, MFSM is cheaper at 0.34% per year. On volatility, MFSM has been the lower-risk option at 0.72%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MFSM or ENFR?

Over the 1-year period, ENFR has performed better with a 27.76% return vs 6.90%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MFSM or ENFR?

MFSM is cheaper with a 0.34% expense ratio, compared with 0.35% for ENFR.

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

ENFR has the higher dividend yield at 4.02%, compared with 3.55% for MFSM.

What is the main difference between MFSM and ENFR?

MFSM is categorized as Municipal Bonds, while ENFR is Energy Equities. They also come from different issuers: MFS and SS&C. Their fees differ too: 0.34% for MFSM and 0.35% for ENFR.

Which has better risk-adjusted returns?

MFSM currently has the higher Sharpe Ratio (2.65 vs 1.88), 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.