BSSX vs. ZTAX

Last updated Jun 5, 2026

BSSX (Invesco BulletShares 2033 Municipal Bond ETF) and ZTAX (X-Square Municipal Income Tax Free ETF) are both Municipal Bonds funds. BSSX is passively managed, while ZTAX is actively managed. Over the past year, BSSX returned 7.02% vs 5.15% for ZTAX. At a 0.01 correlation, their price movements are largely independent. BSSX charges 0.18%/yr vs 1.14%/yr for ZTAX.

Performance

BSSX vs. ZTAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco BulletShares 2033 Municipal Bond ETF (BSSX) 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, BSSX achieves a 1.06% return, which is significantly higher than ZTAX's 0.20% return.

BSSX

• 1D: 0.15%
• 1M: 0.66%
• YTD: 1.06%
• 6M: 1.73%
• 1Y: 7.02%
• 3Y*: —
• 5Y*: —
• 10Y*: —

ZTAX

• 1D: 0.00%
• 1M: -1.71%
• YTD: 0.20%
• 6M: 5.42%
• 1Y: 5.15%
• 3Y*: 4.56%
• 5Y*: —
• 10Y*: —

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

BSSX vs. ZTAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
BSSX Invesco BulletShares 2033 Municipal Bond ETF	1.06%	3.79%	-0.09%	7.50%
ZTAX X-Square Municipal Income Tax Free ETF	0.20%	-1.02%	7.98%	3.94%

Correlation

The correlation between BSSX and ZTAX is -0.15, 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	-0.15
Correlation (All Time) Calculated using the full available price history since Sep 21, 2023	0.01

The correlation between BSSX and ZTAX shifts across timeframes, from -0.15 (1 year) to 0.01 (all time), reflecting how their relationship changes across market environments.

Return for Risk

BSSX vs. ZTAX — Risk / Return Rank

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

BSSX

BSSX Risk / Return Rank: 59
BSSX Sharpe Ratio Rank: 64
BSSX Sortino Ratio Rank: 70
BSSX Omega Ratio Rank: 75
BSSX Calmar Ratio Rank: 44
BSSX Martin Ratio Rank: 42

ZTAX

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

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.

BSSX vs. ZTAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco BulletShares 2033 Municipal Bond ETF (BSSX) 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.

	BSSX	ZTAX	Difference
Sharpe ratio: Return per unit of total volatility	2.10	0.20	+1.90
Sortino ratio: Return per unit of downside risk	3.13	0.48	+2.66
Omega ratio: Gain probability vs. loss probability	1.44	1.08	+0.36
Calmar ratio: Return relative to maximum drawdown	2.15	0.49	+1.66
Martin ratio: Return relative to average drawdown	6.71	1.22	+5.49
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BSSX vs. ZTAX - Sharpe Ratio Comparison

The current BSSX Sharpe Ratio is 2.10, which is higher than the ZTAX Sharpe Ratio of 0.20. The chart below compares the historical Sharpe Ratios of BSSX 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

	BSSX	ZTAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.10	0.20	+1.90
Sharpe Ratio (All Time) Calculated using the full available price history	0.58	0.20	+0.38

Drawdowns

BSSX vs. ZTAX - Drawdown Comparison

The maximum BSSX drawdown since its inception was -8.12%, smaller than the maximum ZTAX drawdown of -15.33%. Use the drawdown chart below to compare losses from any high point for BSSX and ZTAX.

Drawdown Indicators

	BSSX	ZTAX	Difference
Max Drawdown Largest peak-to-trough decline	-8.12%	-15.33%	+7.21%
Max Drawdown (1Y) Largest decline over 1 year	-3.28%	-10.47%	+7.19%
Max Drawdown (3Y) Largest decline over 3 years	—	-15.33%	—
Current Drawdown Current decline from peak	-0.97%	-6.58%	+5.61%
Average Drawdown Average peak-to-trough decline	-3.26%	-6.81%	+3.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.05%	4.23%	-3.18%

Volatility

BSSX vs. ZTAX - Volatility Comparison

The current volatility for Invesco BulletShares 2033 Municipal Bond ETF (BSSX) is 1.17%, while X-Square Municipal Income Tax Free ETF (ZTAX) has a volatility of 4.07%. This indicates that BSSX 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

	BSSX	ZTAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.17%	4.07%	-2.90%
Volatility (6M) Calculated over the trailing 6-month period	2.37%	21.51%	-19.14%
Volatility (1Y) Calculated over the trailing 1-year period	3.36%	26.32%	-22.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.83%	26.83%	-19.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.83%	26.83%	-19.00%

BSSX vs. ZTAX - Expense Ratio Comparison

BSSX has a 0.18% expense ratio, which is lower than ZTAX's 1.14% expense ratio.

Dividends

BSSX vs. ZTAX - Dividend Comparison

BSSX's dividend yield for the trailing twelve months is around 3.30%, less than ZTAX's 4.56% yield.

Position	TTM	2025	2024	2023
BSSX Invesco BulletShares 2033 Municipal Bond ETF	3.30%	3.27%	3.29%	0.95%
ZTAX X-Square Municipal Income Tax Free ETF	4.56%	4.58%	4.55%	2.14%

Frequently Asked Questions

Can I hold both BSSX and ZTAX in my portfolio?

BSSX and ZTAX have a correlation of -0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BSSX or ZTAX?

ZTAX has higher volatility (4.07%) compared to BSSX (1.17%). In terms of maximum drawdown, BSSX dropped -8.12% vs ZTAX's -15.33%.

Which ETF is better, BSSX or ZTAX?

On 1-year performance, BSSX leads with 7.02% vs 5.15% for ZTAX. On fees, BSSX is cheaper at 0.18% per year. On volatility, BSSX has been the lower-risk option at 1.17%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, BSSX or ZTAX?

Over the 1-year period, BSSX has performed better with a 7.02% return vs 5.15%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, BSSX or ZTAX?

BSSX is cheaper with a 0.18% expense ratio, compared with 1.14% for ZTAX.

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

ZTAX has the higher dividend yield at 4.56%, compared with 3.30% for BSSX.

What is the main difference between BSSX and ZTAX?

They also come from different issuers: Invesco and X-Square. Their fees differ too: 0.18% for BSSX and 1.14% for ZTAX.

Which has better risk-adjusted returns?

BSSX currently has the higher Sharpe Ratio (2.10 vs 0.20), 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.