ZMUN vs. MYMK

Last updated Aug 2, 2026

ZMUN (F/m Ultrashort Tax-Free Municipal ETF) and MYMK (SPDR SSGA My2031 Municipal Bond ETF) are both Municipal Bonds funds. ZMUN is passively managed, while MYMK is actively managed. Their 0.12 correlation means their historical movements had little consistent relationship. ZMUN charges 0.30%/yr vs 0.20%/yr for MYMK.

Performance

ZMUN vs. MYMK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in F/m Ultrashort Tax-Free Municipal ETF (ZMUN) and SPDR SSGA My2031 Municipal Bond ETF (MYMK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ZMUN achieves a 2.09% return, which is significantly higher than MYMK's 0.17% return.

ZMUN

• 1D: 0.04%
• 1M: 0.20%
• 6M: 1.82%
• YTD: 2.09%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

MYMK

• 1D: -0.04%
• 1M: -1.00%
• 6M: -0.94%
• YTD: 0.17%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: —

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
MYMK SPDR SSGA My2031 Municipal Bond ETF	$11.24K	$13.48K	$23.89K
ZMUN F/m Ultrashort Tax-Free Municipal ETF	$247.22K	$279.15K	$385.45K

ZMUN vs. MYMK - Yearly Performance Comparison

	2026 (YTD)	2025
ZMUN F/m Ultrashort Tax-Free Municipal ETF	2.09%	0.67%
MYMK SPDR SSGA My2031 Municipal Bond ETF	0.17%	1.23%

Correlation

The correlation between ZMUN and MYMK is 0.12, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (All Time) Calculated using the full available price history since Sep 30, 2025	0.12

Return for Risk

ZMUN vs. MYMK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for F/m Ultrashort Tax-Free Municipal ETF (ZMUN) and SPDR SSGA My2031 Municipal Bond ETF (MYMK). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Drawdowns

ZMUN vs. MYMK - Drawdown Comparison

The maximum ZMUN drawdown since its inception was -0.13%, smaller than the maximum MYMK drawdown of -2.22%. Use the drawdown chart below to compare losses from any high point for ZMUN and MYMK.

Drawdown Indicators

	ZMUN	MYMK	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-2.22%	+2.09%
Current Drawdown Current decline from peak	0.00%	-1.64%	+1.64%
Average Drawdown Average peak-to-trough decline	-0.02%	-0.67%	+0.65%

Volatility

Volatility by Period

	ZMUN	MYMK	Difference
Volatility (1Y) Calculated over the trailing 1-year period	0.54%	1.92%	-1.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.54%	1.92%	-1.38%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.54%	1.92%	-1.38%

ZMUN vs. MYMK - Expense Ratio Comparison

ZMUN has a 0.30% expense ratio, which is higher than MYMK's 0.20% expense ratio.

Dividends

ZMUN vs. MYMK - Dividend Comparison

ZMUN's dividend yield for the trailing twelve months is around 2.92%, more than MYMK's 2.07% yield.

Position	TTM	2025
MYMK SPDR SSGA My2031 Municipal Bond ETF	2.07%	0.77%
ZMUN F/m Ultrashort Tax-Free Municipal ETF	2.92%	0.70%

Frequently Asked Questions

Can I hold both ZMUN and MYMK in my portfolio?

ZMUN and MYMK have a correlation of 0.12, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, ZMUN or MYMK?

On fees, MYMK is cheaper at 0.20% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, ZMUN or MYMK?

MYMK is cheaper with a 0.20% expense ratio, compared with 0.30% for ZMUN.

Which ETF pays a higher dividend yield, ZMUN or MYMK?

ZMUN has the higher dividend yield at 2.92%, compared with 2.07% for MYMK.

What is the main difference between ZMUN and MYMK?

They also come from different issuers: F/m and State Street. Their fees differ too: 0.30% for ZMUN and 0.20% for MYMK.