NSIOX vs. MISHX

Last updated Jun 4, 2026

NSIOX (Nuveen Strategic Municipal Opportunities Fund) and MISHX (AB Municipal Income Shares) are both High Yield Muni funds. Over the past 10 years, NSIOX returned 3.05%/yr vs 3.68%/yr for MISHX. Their correlation of 0.82 suggests significant overlap in exposure. NSIOX charges 0.56%/yr vs 0.00%/yr for MISHX.

Performance

NSIOX vs. MISHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nuveen Strategic Municipal Opportunities Fund (NSIOX) and AB Municipal Income Shares (MISHX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NSIOX achieves a 1.63% return, which is significantly lower than MISHX's 2.13% return. Over the past 10 years, NSIOX has underperformed MISHX with an annualized return of 3.05%, while MISHX has yielded a comparatively higher 3.68% annualized return.

NSIOX

• 1D: 0.20%
• 1M: 0.87%
• YTD: 1.63%
• 6M: 1.92%
• 1Y: 6.24%
• 3Y*: 4.53%
• 5Y*: 0.59%
• 10Y*: 3.05%

MISHX

• 1D: 0.27%
• 1M: 0.96%
• YTD: 2.13%
• 6M: 2.54%
• 1Y: 8.27%
• 3Y*: 5.91%
• 5Y*: 1.63%
• 10Y*: 3.68%

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

NSIOX vs. MISHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NSIOX Nuveen Strategic Municipal Opportunities Fund	1.63%	3.19%	4.61%	7.17%	-13.81%	5.21%	6.82%	10.07%	3.31%	9.77%
MISHX AB Municipal Income Shares	2.13%	6.41%	5.29%	6.24%	-12.77%	6.81%	6.22%	11.52%	0.80%	9.59%

Correlation

The correlation between NSIOX and MISHX is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (10Y) Calculated over the trailing 10-year period	0.84
Correlation (All Time) Calculated using the full available price history since Jan 9, 2015	0.82

The correlation between NSIOX and MISHX has been stable across timeframes, ranging from 0.82 to 0.88 - a consistent structural relationship.

Return for Risk

NSIOX vs. MISHX — Risk / Return Rank

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

NSIOX

NSIOX Risk / Return Rank: 51
NSIOX Sharpe Ratio Rank: 53
NSIOX Sortino Ratio Rank: 64
NSIOX Omega Ratio Rank: 77
NSIOX Calmar Ratio Rank: 33
NSIOX Martin Ratio Rank: 27

MISHX

MISHX Risk / Return Rank: 69
MISHX Sharpe Ratio Rank: 76
MISHX Sortino Ratio Rank: 87
MISHX Omega Ratio Rank: 89
MISHX Calmar Ratio Rank: 50
MISHX Martin Ratio Rank: 46

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.

NSIOX vs. MISHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nuveen Strategic Municipal Opportunities Fund (NSIOX) and AB Municipal Income Shares (MISHX). 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.

	NSIOX	MISHX	Difference
Sharpe ratio: Return per unit of total volatility	2.14	2.52	-0.39
Sortino ratio: Return per unit of downside risk	3.35	4.11	-0.76
Omega ratio: Gain probability vs. loss probability	1.51	1.64	-0.13
Calmar ratio: Return relative to maximum drawdown	2.16	2.69	-0.52
Martin ratio: Return relative to average drawdown	6.45	9.57	-3.12
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NSIOX vs. MISHX - Sharpe Ratio Comparison

The current NSIOX Sharpe Ratio is 2.14, which is comparable to the MISHX Sharpe Ratio of 2.52. The chart below compares the historical Sharpe Ratios of NSIOX and MISHX, 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

	NSIOX	MISHX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.14	2.52	-0.39
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.13	0.33	-0.20
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.65	0.71	-0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.78	0.93	-0.15

Drawdowns

NSIOX vs. MISHX - Drawdown Comparison

The maximum NSIOX drawdown since its inception was -18.38%, roughly equal to the maximum MISHX drawdown of -19.03%. Use the drawdown chart below to compare losses from any high point for NSIOX and MISHX.

Drawdown Indicators

	NSIOX	MISHX	Difference
Max Drawdown Largest peak-to-trough decline	-18.38%	-19.03%	+0.65%
Max Drawdown (1Y) Largest decline over 1 year	-2.91%	-3.09%	+0.18%
Max Drawdown (3Y) Largest decline over 3 years	-6.17%	-7.89%	+1.72%
Max Drawdown (5Y) Largest decline over 5 years	-18.38%	-18.20%	-0.18%
Max Drawdown (10Y) Largest decline over 10 years	-18.38%	-19.03%	+0.65%
Current Drawdown Current decline from peak	-0.46%	-0.12%	-0.34%
Average Drawdown Average peak-to-trough decline	-3.58%	-3.41%	-0.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.97%	0.87%	+0.10%

Volatility

NSIOX vs. MISHX - Volatility Comparison

The current volatility for Nuveen Strategic Municipal Opportunities Fund (NSIOX) is 1.13%, while AB Municipal Income Shares (MISHX) has a volatility of 1.34%. This indicates that NSIOX experiences smaller price fluctuations and is considered to be less risky than MISHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NSIOX	MISHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.13%	1.34%	-0.21%
Volatility (6M) Calculated over the trailing 6-month period	2.13%	2.48%	-0.35%
Volatility (1Y) Calculated over the trailing 1-year period	2.96%	3.32%	-0.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.50%	5.00%	-0.50%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.69%	5.19%	-0.50%

NSIOX vs. MISHX - Expense Ratio Comparison

NSIOX has a 0.56% expense ratio, which is higher than MISHX's 0.00% expense ratio.

Dividends

NSIOX vs. MISHX - Dividend Comparison

NSIOX's dividend yield for the trailing twelve months is around 4.18%, less than MISHX's 4.81% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MISHX AB Municipal Income Shares	4.81%	6.23%	4.80%	3.23%	3.75%	2.77%	3.56%	3.98%	3.77%	3.78%	4.25%	4.38%
NSIOX Nuveen Strategic Municipal Opportunities Fund	4.18%	4.53%	3.91%	3.85%	4.20%	4.25%	2.88%	3.25%	3.12%	3.22%	4.09%	2.48%

Frequently Asked Questions

Can I hold both NSIOX and MISHX in my portfolio?

NSIOX and MISHX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NSIOX or MISHX?

MISHX has higher volatility (1.34%) compared to NSIOX (1.13%). In terms of maximum drawdown, NSIOX dropped -18.38% vs MISHX's -19.03%.

Which has better risk-adjusted returns?

MISHX currently has the higher Sharpe Ratio (2.52 vs 2.14), 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.