INMU vs. ZTAX

Last updated Jun 4, 2026

INMU (BlackRock Intermediate Muni Income Bond ETF) and ZTAX (X-Square Municipal Income Tax Free ETF) are both Municipal Bonds funds. Both are actively managed. Over the past 3 years, INMU returned 4.89%/yr vs 4.56%/yr for ZTAX. At a 0.02 correlation, their price movements are largely independent. INMU charges 0.30%/yr vs 1.14%/yr for ZTAX.

Performance

INMU vs. ZTAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Intermediate Muni Income Bond ETF (INMU) and X-Square Municipal Income Tax Free ETF (ZTAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, INMU achieves a 1.73% return, which is significantly higher than ZTAX's 0.20% return.

INMU

• 1D: 0.00%
• 1M: 0.57%
• YTD: 1.73%
• 6M: 1.98%
• 1Y: 7.17%
• 3Y*: 4.89%
• 5Y*: 1.78%
• 10Y*: —

ZTAX

• 1D: 0.00%
• 1M: -1.80%
• YTD: 0.20%
• 6M: 5.42%
• 1Y: 6.21%
• 3Y*: 4.56%
• 5Y*: —
• 10Y*: —

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

INMU vs. ZTAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
INMU BlackRock Intermediate Muni Income Bond ETF	1.73%	5.52%	2.77%	4.53%
ZTAX X-Square Municipal Income Tax Free ETF	0.20%	-1.02%	7.98%	9.14%

Correlation

The correlation between INMU and ZTAX is -0.10, 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	-0.10
Correlation (3Y) Calculated over the trailing 3-year period	0.02
Correlation (All Time) Calculated using the full available price history since May 22, 2023	0.02

The correlation between INMU and ZTAX shifts across timeframes, from -0.10 (1 year) to 0.02 (all time), reflecting how their relationship changes across market environments.

Return for Risk

INMU vs. ZTAX — Risk / Return Rank

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

INMU

INMU Risk / Return Rank: 76
INMU Sharpe Ratio Rank: 86
INMU Sortino Ratio Rank: 90
INMU Omega Ratio Rank: 93
INMU Calmar Ratio Rank: 57
INMU Martin Ratio Rank: 55

ZTAX

ZTAX Risk / Return Rank: 14
ZTAX Sharpe Ratio Rank: 12
ZTAX Sortino Ratio Rank: 13
ZTAX Omega Ratio Rank: 15
ZTAX Calmar Ratio Rank: 17
ZTAX Martin Ratio Rank: 16

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.

INMU vs. ZTAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Intermediate Muni Income Bond ETF (INMU) and X-Square Municipal Income Tax Free ETF (ZTAX). 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.

	INMU	ZTAX	Difference
Sharpe ratio: Return per unit of total volatility	2.87	0.24	+2.64
Sortino ratio: Return per unit of downside risk	4.22	0.53	+3.69
Omega ratio: Gain probability vs. loss probability	1.65	1.09	+0.56
Calmar ratio: Return relative to maximum drawdown	2.79	0.60	+2.19
Martin ratio: Return relative to average drawdown	9.53	1.48	+8.06
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

INMU vs. ZTAX - Sharpe Ratio Comparison

The current INMU Sharpe Ratio is 2.87, which is higher than the ZTAX Sharpe Ratio of 0.24. The chart below compares the historical Sharpe Ratios of INMU and ZTAX, 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

	INMU	ZTAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.87	0.24	+2.64
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.50	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.20	+0.40

Drawdowns

INMU vs. ZTAX - Drawdown Comparison

The maximum INMU drawdown since its inception was -10.67%, smaller than the maximum ZTAX drawdown of -15.33%. Use the drawdown chart below to compare losses from any high point for INMU and ZTAX.

Drawdown Indicators

	INMU	ZTAX	Difference
Max Drawdown Largest peak-to-trough decline	-10.67%	-15.33%	+4.66%
Max Drawdown (1Y) Largest decline over 1 year	-2.58%	-10.47%	+7.89%
Max Drawdown (3Y) Largest decline over 3 years	-4.88%	-15.33%	+10.45%
Max Drawdown (5Y) Largest decline over 5 years	-10.67%	—	—
Current Drawdown Current decline from peak	-0.66%	-6.58%	+5.92%
Average Drawdown Average peak-to-trough decline	-2.81%	-6.81%	+4.00%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.75%	4.22%	-3.47%

Volatility

INMU vs. ZTAX - Volatility Comparison

The current volatility for BlackRock Intermediate Muni Income Bond ETF (INMU) is 0.81%, while X-Square Municipal Income Tax Free ETF (ZTAX) has a volatility of 4.07%. This indicates that INMU experiences smaller price fluctuations and is considered to be less risky than ZTAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	INMU	ZTAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.81%	4.07%	-3.26%
Volatility (6M) Calculated over the trailing 6-month period	1.88%	21.96%	-20.08%
Volatility (1Y) Calculated over the trailing 1-year period	2.51%	26.32%	-23.81%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.60%	26.84%	-23.24%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.54%	26.84%	-23.30%

INMU vs. ZTAX - Expense Ratio Comparison

INMU has a 0.30% expense ratio, which is lower than ZTAX's 1.14% expense ratio.

Dividends

INMU vs. ZTAX - Dividend Comparison

INMU's dividend yield for the trailing twelve months is around 3.36%, less than ZTAX's 4.56% yield.

Position	TTM	2025	2024	2023	2022	2021
INMU BlackRock Intermediate Muni Income Bond ETF	3.36%	3.48%	3.47%	3.44%	1.92%	1.14%
ZTAX X-Square Municipal Income Tax Free ETF	4.56%	4.58%	4.55%	2.14%	0.00%	0.00%

Frequently Asked Questions

Can I hold both INMU and ZTAX in my portfolio?

INMU and ZTAX have a correlation of -0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, INMU or ZTAX?

ZTAX has higher volatility (4.07%) compared to INMU (0.81%). In terms of maximum drawdown, INMU dropped -10.67% vs ZTAX's -15.33%.

Which ETF is better, INMU or ZTAX?

On 3-year performance, INMU leads with 4.89% vs 4.56% for ZTAX. On fees, INMU is cheaper at 0.30% per year. On volatility, INMU has been the lower-risk option at 0.81%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, INMU or ZTAX?

Over the 3-year period, INMU has performed better with a 4.89% return vs 4.56%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, INMU or ZTAX?

INMU is cheaper with a 0.30% expense ratio, compared with 1.14% for ZTAX.

Which ETF pays a higher dividend yield, INMU or ZTAX?

ZTAX has the higher dividend yield at 4.56%, compared with 3.36% for INMU.

What is the main difference between INMU and ZTAX?

They also come from different issuers: BlackRock and X-Square. Their fees differ too: 0.30% for INMU and 1.14% for ZTAX.

Which has better risk-adjusted returns?

INMU currently has the higher Sharpe Ratio (2.87 vs 0.24), 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.