NMI vs. VWSUX

Last updated Jun 5, 2026

NMI (Nuveen Municipal Income Fund, Inc.) and VWSUX (Vanguard Short-Term Tax-Exempt Fund Admiral Shares) are both Municipal Bonds funds. Over the past 10 years, NMI returned 2.60%/yr vs 2.01%/yr for VWSUX. At a 0.12 correlation, their price movements are largely independent. NMI charges 0.72%/yr vs 0.09%/yr for VWSUX.

Performance

NMI vs. VWSUX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nuveen Municipal Income Fund, Inc. (NMI) and Vanguard Short-Term Tax-Exempt Fund Admiral Shares (VWSUX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NMI achieves a 11.50% return, which is significantly higher than VWSUX's 1.20% return. Over the past 10 years, NMI has outperformed VWSUX with an annualized return of 2.60%, while VWSUX has yielded a comparatively lower 2.01% annualized return.

NMI

• 1D: -0.14%
• 1M: 9.19%
• YTD: 11.50%
• 6M: 11.36%
• 1Y: 16.27%
• 3Y*: 9.16%
• 5Y*: 2.66%
• 10Y*: 2.60%

VWSUX

• 1D: 0.06%
• 1M: 0.38%
• YTD: 1.20%
• 6M: 1.54%
• 1Y: 3.76%
• 3Y*: 4.17%
• 5Y*: 2.54%
• 10Y*: 2.01%

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

NMI vs. VWSUX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NMI Nuveen Municipal Income Fund, Inc.	11.50%	10.52%	7.03%	1.90%	-15.09%	3.86%	4.70%	16.02%	-8.07%	7.49%
VWSUX Vanguard Short-Term Tax-Exempt Fund Admiral Shares	1.20%	4.90%	3.77%	3.70%	-0.73%	0.19%	1.91%	2.59%	1.67%	1.10%

Correlation

The correlation between NMI and VWSUX is 0.13, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.13
Correlation (3Y) Calculated over the trailing 3-year period	0.28
Correlation (5Y) Calculated over the trailing 5-year period	0.25
Correlation (10Y) Calculated over the trailing 10-year period	0.18
Correlation (All Time) Calculated using the full available price history since Feb 13, 2001	0.12

The correlation between NMI and VWSUX shifts across timeframes, from 0.12 (all time) to 0.28 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

NMI vs. VWSUX — Risk / Return Rank

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

NMI

NMI Risk / Return Rank: 17
NMI Sharpe Ratio Rank: 14
NMI Sortino Ratio Rank: 17
NMI Omega Ratio Rank: 26
NMI Calmar Ratio Rank: 18
NMI Martin Ratio Rank: 12

VWSUX

VWSUX Risk / Return Rank: 97
VWSUX Sharpe Ratio Rank: 95
VWSUX Sortino Ratio Rank: 99
VWSUX Omega Ratio Rank: 99
VWSUX Calmar Ratio Rank: 94
VWSUX Martin Ratio Rank: 96

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.

NMI vs. VWSUX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nuveen Municipal Income Fund, Inc. (NMI) and Vanguard Short-Term Tax-Exempt Fund Admiral Shares (VWSUX). 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.

	NMI	VWSUX	Difference
Sharpe ratio: Return per unit of total volatility	1.03	3.46	-2.43
Sortino ratio: Return per unit of downside risk	1.68	8.73	-7.05
Omega ratio: Gain probability vs. loss probability	1.26	2.71	-1.45
Calmar ratio: Return relative to maximum drawdown	1.49	5.57	-4.08
Martin ratio: Return relative to average drawdown	3.51	24.88	-21.38
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NMI vs. VWSUX - Sharpe Ratio Comparison

The current NMI Sharpe Ratio is 1.03, which is lower than the VWSUX Sharpe Ratio of 3.46. The chart below compares the historical Sharpe Ratios of NMI and VWSUX, 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

	NMI	VWSUX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.03	3.46	-2.43
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.18	2.09	-1.90
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.17	1.80	-1.62
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	2.05	-1.71

Drawdowns

NMI vs. VWSUX - Drawdown Comparison

The maximum NMI drawdown since its inception was -28.92%, which is greater than VWSUX's maximum drawdown of -3.08%. Use the drawdown chart below to compare losses from any high point for NMI and VWSUX.

Drawdown Indicators

	NMI	VWSUX	Difference
Max Drawdown Largest peak-to-trough decline	-28.92%	-3.08%	-25.84%
Max Drawdown (1Y) Largest decline over 1 year	-10.96%	-0.69%	-10.27%
Max Drawdown (3Y) Largest decline over 3 years	-14.54%	-1.01%	-13.53%
Max Drawdown (5Y) Largest decline over 5 years	-28.92%	-2.23%	-26.69%
Max Drawdown (10Y) Largest decline over 10 years	-28.92%	-3.08%	-25.84%
Current Drawdown Current decline from peak	-1.19%	0.00%	-1.19%
Average Drawdown Average peak-to-trough decline	-5.92%	-0.15%	-5.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.65%	0.15%	+4.50%

Volatility

NMI vs. VWSUX - Volatility Comparison

Nuveen Municipal Income Fund, Inc. (NMI) has a higher volatility of 7.28% compared to Vanguard Short-Term Tax-Exempt Fund Admiral Shares (VWSUX) at 0.39%. This indicates that NMI's price experiences larger fluctuations and is considered to be riskier than VWSUX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NMI	VWSUX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.28%	0.39%	+6.89%
Volatility (6M) Calculated over the trailing 6-month period	13.31%	0.82%	+12.49%
Volatility (1Y) Calculated over the trailing 1-year period	15.89%	1.11%	+14.78%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.46%	1.23%	+13.23%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.93%	1.12%	+13.81%

NMI vs. VWSUX - Expense Ratio Comparison

NMI has a 0.72% expense ratio, which is higher than VWSUX's 0.09% expense ratio.

Dividends

NMI vs. VWSUX - Dividend Comparison

NMI's dividend yield for the trailing twelve months is around 4.20%, more than VWSUX's 3.12% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NMI Nuveen Municipal Income Fund, Inc.	4.20%	4.59%	4.63%	4.04%	3.51%	3.22%	3.53%	4.15%	5.12%	4.21%	4.45%	4.28%
VWSUX Vanguard Short-Term Tax-Exempt Fund Admiral Shares	3.12%	4.00%	3.82%	2.27%	1.24%	0.63%	1.26%	1.79%	1.53%	1.16%	0.97%	0.78%

Frequently Asked Questions

Can I hold both NMI and VWSUX in my portfolio?

NMI and VWSUX have a correlation of 0.13, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NMI or VWSUX?

NMI has higher volatility (7.28%) compared to VWSUX (0.39%). In terms of maximum drawdown, NMI dropped -28.92% vs VWSUX's -3.08%.

Which has better risk-adjusted returns?

VWSUX currently has the higher Sharpe Ratio (3.46 vs 1.03), 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.