MUNX vs. FMUN

Last updated Jun 27, 2026

MUNX (AMG GW&K Muni Income ETF) and FMUN (Fidelity Systematic Municipal Bond Index ETF) are both Municipal Bonds funds. Both are actively managed. A 0.62 correlation means they provide meaningful diversification when combined. MUNX charges 0.29%/yr vs 0.05%/yr for FMUN.

Performance

MUNX vs. FMUN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AMG GW&K Muni Income ETF (MUNX) and Fidelity Systematic Municipal Bond Index ETF (FMUN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MUNX achieves a 2.44% return, which is significantly higher than FMUN's 1.88% return.

MUNX

• 1D: 0.05%
• 1M: 0.94%
• YTD: 2.44%
• 6M: 2.62%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

FMUN

• 1D: 0.08%
• 1M: 0.98%
• YTD: 1.88%
• 6M: 1.82%
• 1Y: 7.30%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MUNX vs. FMUN - Yearly Performance Comparison

	2026 (YTD)	2025
MUNX AMG GW&K Muni Income ETF	2.44%	0.49%
FMUN Fidelity Systematic Municipal Bond Index ETF	1.88%	0.56%

Correlation

The correlation between MUNX and FMUN is 0.62, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (All Time) Calculated using the full available price history since Oct 30, 2025	0.62

Return for Risk

MUNX vs. FMUN — Risk / Return Rank

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

MUNX

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

FMUN

FMUN Risk / Return Rank: 73
FMUN Sharpe Ratio Rank: 84
FMUN Sortino Ratio Rank: 87
FMUN Omega Ratio Rank: 91
FMUN Calmar Ratio Rank: 53
FMUN Martin Ratio Rank: 49

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.

MUNX vs. FMUN - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AMG GW&K Muni Income ETF (MUNX) and Fidelity Systematic Municipal Bond Index ETF (FMUN). 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.

	MUNX	FMUN	Difference
Sharpe ratio: Return per unit of total volatility	—	2.37	—
Sortino ratio: Return per unit of downside risk	—	3.42	—
Omega ratio: Gain probability vs. loss probability	—	1.52	—
Calmar ratio: Return relative to maximum drawdown	—	2.29	—
Martin ratio: Return relative to average drawdown	—	7.39	—

Drawdowns

MUNX vs. FMUN - Drawdown Comparison

The maximum MUNX drawdown since its inception was -2.95%, smaller than the maximum FMUN drawdown of -3.83%. Use the drawdown chart below to compare losses from any high point for MUNX and FMUN.

Drawdown Indicators

	MUNX	FMUN	Difference
Max Drawdown Largest peak-to-trough decline	-2.95%	-3.83%	+0.88%
Max Drawdown (1Y) Largest decline over 1 year	—	-3.21%	—
Current Drawdown Current decline from peak	0.00%	-0.49%	+0.49%
Average Drawdown Average peak-to-trough decline	-0.60%	-1.12%	+0.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.99%	—

Volatility

Volatility by Period

	MUNX	FMUN	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.89%	—
Volatility (6M) Calculated over the trailing 6-month period	—	2.39%	—
Volatility (1Y) Calculated over the trailing 1-year period	3.41%	3.10%	+0.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.41%	4.11%	-0.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.41%	4.11%	-0.70%

MUNX vs. FMUN - Expense Ratio Comparison

MUNX has a 0.29% expense ratio, which is higher than FMUN's 0.05% expense ratio.

Dividends

MUNX vs. FMUN - Dividend Comparison

MUNX's dividend yield for the trailing twelve months is around 1.94%, less than FMUN's 3.28% yield.

Position	TTM	2025
FMUN Fidelity Systematic Municipal Bond Index ETF	3.28%	2.41%
MUNX AMG GW&K Muni Income ETF	1.94%	0.55%

Frequently Asked Questions

Can I hold both MUNX and FMUN in my portfolio?

MUNX and FMUN have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MUNX or FMUN?

On fees, FMUN is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MUNX or FMUN?

FMUN is cheaper with a 0.05% expense ratio, compared with 0.29% for MUNX.

Which ETF pays a higher dividend yield, MUNX or FMUN?

FMUN has the higher dividend yield at 3.28%, compared with 1.94% for MUNX.

What is the main difference between MUNX and FMUN?

They also come from different issuers: AMG and Fidelity. Their fees differ too: 0.29% for MUNX and 0.05% for FMUN.