MIUIX vs. MFEIX

Last updated Jun 4, 2026

MIUIX (MFS Municipal Intermediate Fund) and MFEIX (MFS Growth I) are both mutual funds - MIUIX is a Municipal Bonds fund managed by MFS, while MFEIX is a Large Cap Growth Equities fund managed by MFS. Over the past 5 years, MIUIX returned 1.47%/yr vs 14.38%/yr for MFEIX. At a 0.08 correlation, their price movements are largely independent. MIUIX charges 0.45%/yr vs 0.60%/yr for MFEIX.

Performance

MIUIX vs. MFEIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Municipal Intermediate Fund (MIUIX) and MFS Growth I (MFEIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MIUIX achieves a 1.54% return, which is significantly lower than MFEIX's 6.29% return.

MIUIX

• 1D: 0.11%
• 1M: 0.64%
• YTD: 1.54%
• 6M: 1.97%
• 1Y: 7.23%
• 3Y*: 4.88%
• 5Y*: 1.47%
• 10Y*: —

MFEIX

• 1D: -0.34%
• 1M: 4.75%
• YTD: 6.29%
• 6M: 5.95%
• 1Y: 17.64%
• 3Y*: 26.61%
• 5Y*: 14.38%
• 10Y*: 17.67%

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

MIUIX vs. MFEIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
MIUIX MFS Municipal Intermediate Fund	1.54%	6.64%	3.00%	5.19%	-8.06%	-0.17%
MFEIX MFS Growth I	6.29%	12.34%	49.67%	36.15%	-31.14%	15.40%

Correlation

The correlation between MIUIX and MFEIX is 0.09, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.09
Correlation (3Y) Calculated over the trailing 3-year period	0.07
Correlation (5Y) Calculated over the trailing 5-year period	0.08
Correlation (All Time) Calculated using the full available price history since May 27, 2021	0.08

Return for Risk

MIUIX vs. MFEIX — Risk / Return Rank

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

MIUIX

MIUIX Risk / Return Rank: 68
MIUIX Sharpe Ratio Rank: 86
MIUIX Sortino Ratio Rank: 90
MIUIX Omega Ratio Rank: 94
MIUIX Calmar Ratio Rank: 36
MIUIX Martin Ratio Rank: 34

MFEIX

MFEIX Risk / Return Rank: 14
MFEIX Sharpe Ratio Rank: 17
MFEIX Sortino Ratio Rank: 15
MFEIX Omega Ratio Rank: 16
MFEIX Calmar Ratio Rank: 11
MFEIX Martin Ratio Rank: 11

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.

MIUIX vs. MFEIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Municipal Intermediate Fund (MIUIX) and MFS Growth I (MFEIX). 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.

	MIUIX	MFEIX	Difference
Sharpe ratio Return per unit of total volatility	2.80	1.15	+1.65
Sortino ratio Return per unit of downside risk	4.43	1.64	+2.80
Omega ratio Gain probability vs. loss probability	1.75	1.21	+0.54
Calmar ratio Return relative to maximum drawdown	2.26	1.05	+1.21
Martin ratio Return relative to average drawdown	7.69	3.43	+4.26
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MIUIX vs. MFEIX - Sharpe Ratio Comparison

The current MIUIX Sharpe Ratio is 2.80, which is higher than the MFEIX Sharpe Ratio of 1.15. The chart below compares the historical Sharpe Ratios of MIUIX and MFEIX, 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

	MIUIX	MFEIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.80	1.15	+1.65
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.43	0.66	-0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.83	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.44	0.44	-0.01

Drawdowns

MIUIX vs. MFEIX - Drawdown Comparison

The maximum MIUIX drawdown since its inception was -12.91%, smaller than the maximum MFEIX drawdown of -72.24%. Use the drawdown chart below to compare losses from any high point for MIUIX and MFEIX.

Drawdown Indicators

	MIUIX	MFEIX	Difference
Max Drawdown Largest peak-to-trough decline	-12.91%	-72.24%	+59.33%
Max Drawdown (1Y) Largest decline over 1 year	-3.15%	-17.30%	+14.15%
Max Drawdown (3Y) Largest decline over 3 years	-5.04%	-23.24%	+18.20%
Max Drawdown (5Y) Largest decline over 5 years	-12.91%	-36.11%	+23.20%
Max Drawdown (10Y) Largest decline over 10 years	—	-36.11%	—
Current Drawdown Current decline from peak	-0.86%	-0.34%	-0.52%
Average Drawdown Average peak-to-trough decline	-3.99%	-23.73%	+19.74%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.93%	5.31%	-4.38%

Volatility

MIUIX vs. MFEIX - Volatility Comparison

The current volatility for MFS Municipal Intermediate Fund (MIUIX) is 0.91%, while MFS Growth I (MFEIX) has a volatility of 3.59%. This indicates that MIUIX experiences smaller price fluctuations and is considered to be less risky than MFEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MIUIX	MFEIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.91%	3.59%	-2.68%
Volatility (6M) Calculated over the trailing 6-month period	2.03%	12.24%	-10.21%
Volatility (1Y) Calculated over the trailing 1-year period	2.56%	15.83%	-13.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.43%	21.90%	-18.47%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.43%	21.24%	-17.81%

MIUIX vs. MFEIX - Expense Ratio Comparison

MIUIX has a 0.45% expense ratio, which is lower than MFEIX's 0.60% expense ratio.

Dividends

MIUIX vs. MFEIX - Dividend Comparison

MIUIX's dividend yield for the trailing twelve months is around 3.68%, less than MFEIX's 14.11% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MFEIX MFS Growth I	14.11%	14.99%	25.47%	4.86%	1.05%	2.76%	3.57%	1.57%	3.78%	2.50%	1.61%	3.65%
MIUIX MFS Municipal Intermediate Fund	3.68%	4.82%	3.61%	2.39%	1.30%	0.64%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MIUIX and MFEIX in my portfolio?

MIUIX and MFEIX have a correlation of 0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MIUIX or MFEIX?

MFEIX has higher volatility (3.59%) compared to MIUIX (0.91%). In terms of maximum drawdown, MIUIX dropped -12.91% vs MFEIX's -72.24%.

Which has better risk-adjusted returns?

MIUIX currently has the higher Sharpe Ratio (2.80 vs 1.15), 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.