BKMS vs. MUB

Last updated Jun 5, 2026

BKMS (BNY Mellon Municipal Short Duration ETF) and MUB (iShares National AMT-Free Muni Bond ETF) are both Municipal Bonds funds. BKMS is actively managed, while MUB is passively managed. At a 0.48 correlation, their price movements are largely independent. BKMS charges 0.35%/yr vs 0.07%/yr for MUB.

Performance

BKMS vs. MUB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BNY Mellon Municipal Short Duration ETF (BKMS) and iShares National AMT-Free Muni Bond ETF (MUB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

BKMS

• 1D: 0.04%
• 1M: 0.34%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

MUB

• 1D: 0.17%
• 1M: 0.66%
• YTD: 1.41%
• 6M: 1.92%
• 1Y: 6.87%
• 3Y*: 3.41%
• 5Y*: 0.89%
• 10Y*: 2.01%

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

BKMS vs. MUB - Yearly Performance Comparison

	2026 (YTD)
BKMS BNY Mellon Municipal Short Duration ETF	0.62%
MUB iShares National AMT-Free Muni Bond ETF	1.00%

Correlation

The correlation between BKMS and MUB is 0.48, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jan 13, 2026	0.48

Return for Risk

BKMS vs. MUB — Risk / Return Rank

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

MUB

MUB Risk / Return Rank: 68
MUB Sharpe Ratio Rank: 74
MUB Sortino Ratio Rank: 78
MUB Omega Ratio Rank: 83
MUB Calmar Ratio Rank: 51
MUB Martin Ratio Rank: 52

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.

BKMS vs. MUB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BNY Mellon Municipal Short Duration ETF (BKMS) and iShares National AMT-Free Muni Bond ETF (MUB). 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.

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

Sharpe Ratios by Period

	BKMS	MUB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	2.37	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.22	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.41	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.28	0.59	+0.69

Drawdowns

BKMS vs. MUB - Drawdown Comparison

The maximum BKMS drawdown since its inception was -0.87%, smaller than the maximum MUB drawdown of -13.68%. Use the drawdown chart below to compare losses from any high point for BKMS and MUB.

Drawdown Indicators

	BKMS	MUB	Difference
Max Drawdown Largest peak-to-trough decline	-0.87%	-13.68%	+12.81%
Max Drawdown (1Y) Largest decline over 1 year	—	-2.79%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-5.34%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-11.88%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-13.68%	—
Current Drawdown Current decline from peak	-0.09%	-0.53%	+0.44%
Average Drawdown Average peak-to-trough decline	-0.29%	-2.23%	+1.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.79%	—

Volatility

Volatility by Period

	BKMS	MUB	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.98%	—
Volatility (6M) Calculated over the trailing 6-month period	—	2.22%	—
Volatility (1Y) Calculated over the trailing 1-year period	1.24%	2.92%	-1.68%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.24%	4.06%	-2.82%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.24%	4.92%	-3.68%

BKMS vs. MUB - Expense Ratio Comparison

BKMS has a 0.35% expense ratio, which is higher than MUB's 0.07% expense ratio.

Dividends

BKMS vs. MUB - Dividend Comparison

BKMS's dividend yield for the trailing twelve months is around 1.11%, less than MUB's 3.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BKMS BNY Mellon Municipal Short Duration ETF	1.11%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MUB iShares National AMT-Free Muni Bond ETF	3.17%	3.14%	3.01%	2.65%	2.11%	1.81%	2.11%	2.42%	2.46%	2.26%	2.21%	2.51%

Frequently Asked Questions

Can I hold both BKMS and MUB in my portfolio?

BKMS and MUB have a correlation of 0.48, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, BKMS or MUB?

On fees, MUB is cheaper at 0.07% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, BKMS or MUB?

MUB is cheaper with a 0.07% expense ratio, compared with 0.35% for BKMS.

Which ETF pays a higher dividend yield, BKMS or MUB?

MUB has the higher dividend yield at 3.17%, compared with 1.11% for BKMS.

What is the main difference between BKMS and MUB?

They also come from different issuers: BNY Mellon and iShares. Their fees differ too: 0.35% for BKMS and 0.07% for MUB.