NIM vs. MMU

Last updated Jun 24, 2026

NIM (Nuveen Select Maturities Municipal Fund) and MMU (Western Asset Managed Municipals Fund Inc) are both Municipal Bonds funds. Over the past 10 years, NIM returned 1.82%/yr vs 1.38%/yr for MMU. At a 0.17 correlation, their price movements are largely independent. NIM charges 0.03%/yr vs 0.01%/yr for MMU.

Performance

NIM vs. MMU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nuveen Select Maturities Municipal Fund (NIM) and Western Asset Managed Municipals Fund Inc (MMU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NIM achieves a 1.69% return, which is significantly lower than MMU's 2.52% return. Over the past 10 years, NIM has outperformed MMU with an annualized return of 1.82%, while MMU has yielded a comparatively lower 1.38% annualized return.

NIM

• 1D: 0.27%
• 1M: 1.11%
• YTD: 1.69%
• 6M: 2.18%
• 1Y: 7.26%
• 3Y*: 5.14%
• 5Y*: 0.20%
• 10Y*: 1.82%

MMU

• 1D: -0.05%
• 1M: 3.73%
• YTD: 2.52%
• 6M: 3.61%
• 1Y: 12.20%
• 3Y*: 7.74%
• 5Y*: -0.24%
• 10Y*: 1.38%

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

NIM vs. MMU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NIM Nuveen Select Maturities Municipal Fund	1.69%	10.88%	2.74%	0.75%	-12.95%	2.95%	5.44%	12.77%	-0.49%	5.40%
MMU Western Asset Managed Municipals Fund Inc	2.52%	9.19%	6.58%	5.63%	-19.58%	5.83%	0.71%	10.08%	-4.55%	8.30%

Correlation

The correlation between NIM and MMU is 0.33, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.33
Correlation (3Y) Calculated over the trailing 3-year period	0.43
Correlation (5Y) Calculated over the trailing 5-year period	0.37
Correlation (10Y) Calculated over the trailing 10-year period	0.30
Correlation (All Time) Calculated using the full available price history since Oct 27, 1994	0.17

The correlation between NIM and MMU shifts across timeframes, from 0.17 (all time) to 0.43 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

NIM vs. MMU — Risk / Return Rank

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

NIM

NIM Risk / Return Rank: 11
NIM Sharpe Ratio Rank: 11
NIM Sortino Ratio Rank: 10
NIM Omega Ratio Rank: 11
NIM Calmar Ratio Rank: 13
NIM Martin Ratio Rank: 10

MMU

MMU Risk / Return Rank: 34
MMU Sharpe Ratio Rank: 31
MMU Sortino Ratio Rank: 38
MMU Omega Ratio Rank: 34
MMU Calmar Ratio Rank: 34
MMU Martin Ratio Rank: 33

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.

NIM vs. MMU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nuveen Select Maturities Municipal Fund (NIM) and Western Asset Managed Municipals Fund Inc (MMU). 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.

	NIM	MMU	Difference
Sharpe ratio: Return per unit of total volatility	0.81	1.47	-0.66
Sortino ratio: Return per unit of downside risk	1.16	2.36	-1.20
Omega ratio: Gain probability vs. loss probability	1.16	1.29	-0.13
Calmar ratio: Return relative to maximum drawdown	1.09	2.08	-0.99
Martin ratio: Return relative to average drawdown	2.67	7.02	-4.35

NIM vs. MMU - Sharpe Ratio Comparison

The current NIM Sharpe Ratio is 0.81, which is lower than the MMU Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of NIM and MMU, 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

NIM vs. MMU - Drawdown Comparison

The maximum NIM drawdown since its inception was -23.09%, smaller than the maximum MMU drawdown of -34.51%. Use the drawdown chart below to compare losses from any high point for NIM and MMU.

Drawdown Indicators

	NIM	MMU	Difference
Max Drawdown Largest peak-to-trough decline	-23.09%	-34.51%	+11.42%
Max Drawdown (1Y) Largest decline over 1 year	-6.67%	-5.88%	-0.79%
Max Drawdown (3Y) Largest decline over 3 years	-6.83%	-12.86%	+6.03%
Max Drawdown (5Y) Largest decline over 5 years	-19.96%	-31.89%	+11.93%
Max Drawdown (10Y) Largest decline over 10 years	-19.96%	-34.51%	+14.55%
Current Drawdown Current decline from peak	-4.90%	-4.66%	-0.24%
Average Drawdown Average peak-to-trough decline	-5.93%	-6.83%	+0.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.73%	1.74%	+0.99%

Volatility

NIM vs. MMU - Volatility Comparison

The current volatility for Nuveen Select Maturities Municipal Fund (NIM) is 1.62%, while Western Asset Managed Municipals Fund Inc (MMU) has a volatility of 2.40%. This indicates that NIM experiences smaller price fluctuations and is considered to be less risky than MMU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NIM	MMU	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.62%	2.40%	-0.78%
Volatility (6M) Calculated over the trailing 6-month period	7.14%	7.09%	+0.05%
Volatility (1Y) Calculated over the trailing 1-year period	8.99%	8.34%	+0.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.58%	10.69%	-0.11%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	10.78%	13.01%	-2.23%

NIM vs. MMU - Expense Ratio Comparison

NIM has a 0.03% expense ratio, which is higher than MMU's 0.01% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

NIM vs. MMU - Dividend Comparison

NIM's dividend yield for the trailing twelve months is around 3.71%, less than MMU's 6.31% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MMU Western Asset Managed Municipals Fund Inc	6.31%	6.26%	6.16%	4.36%	4.65%	3.88%	4.21%	4.96%	5.68%	5.37%	5.67%	5.50%
NIM Nuveen Select Maturities Municipal Fund	3.71%	3.61%	4.10%	3.49%	2.88%	2.69%	3.42%	3.03%	3.27%	3.15%	3.23%	3.27%

Frequently Asked Questions

Can I hold both NIM and MMU in my portfolio?

NIM and MMU have a correlation of 0.33, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NIM or MMU?

MMU has higher volatility (2.40%) compared to NIM (1.62%). In terms of maximum drawdown, NIM dropped -23.09% vs MMU's -34.51%.

Which has better risk-adjusted returns?

MMU currently has the higher Sharpe Ratio (1.47 vs 0.81), 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.