MYMI vs. MUB

Last updated Jun 24, 2026

MYMI (State Street My2029 Municipal Bond ETF) and MUB (iShares National AMT-Free Muni Bond ETF) are both Municipal Bonds funds. MYMI is actively managed, while MUB is passively managed. Over the past year, MYMI returned 4.31% vs 6.40% for MUB. Their correlation of 0.80 suggests significant overlap in exposure. MYMI charges 0.20%/yr vs 0.07%/yr for MUB.

Performance

MYMI vs. MUB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street My2029 Municipal Bond ETF (MYMI) and iShares National AMT-Free Muni Bond ETF (MUB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with MYMI having a 1.47% return and MUB slightly higher at 1.48%.

MYMI

• 1D: 0.00%
• 1M: 0.68%
• YTD: 1.47%
• 6M: 1.49%
• 1Y: 4.31%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MUB

• 1D: -0.06%
• 1M: 1.29%
• YTD: 1.48%
• 6M: 1.78%
• 1Y: 6.40%
• 3Y*: 3.19%
• 5Y*: 0.93%
• 10Y*: 1.90%

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

MYMI vs. MUB - Yearly Performance Comparison

	2026 (YTD)	2025	2024
MYMI State Street My2029 Municipal Bond ETF	1.47%	3.12%	-0.99%
MUB iShares National AMT-Free Muni Bond ETF	1.48%	3.78%	-0.73%

Correlation

The correlation between MYMI and MUB is 0.77, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.77
Correlation (All Time) Calculated using the full available price history since Sep 24, 2024	0.80

The correlation between MYMI and MUB has been stable across timeframes, ranging from 0.77 to 0.80 - a consistent structural relationship.

Return for Risk

MYMI vs. MUB — Risk / Return Rank

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

MYMI

MYMI Risk / Return Rank: 82
MYMI Sharpe Ratio Rank: 89
MYMI Sortino Ratio Rank: 93
MYMI Omega Ratio Rank: 95
MYMI Calmar Ratio Rank: 69
MYMI Martin Ratio Rank: 64

MUB

MUB Risk / Return Rank: 66
MUB Sharpe Ratio Rank: 73
MUB Sortino Ratio Rank: 77
MUB Omega Ratio Rank: 82
MUB Calmar Ratio Rank: 48
MUB 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.

MYMI vs. MUB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street My2029 Municipal Bond ETF (MYMI) 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.

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.

	MYMI	MUB	Difference
Sharpe ratio: Return per unit of total volatility	2.65	2.23	+0.42
Sortino ratio: Return per unit of downside risk	4.15	3.24	+0.90
Omega ratio: Gain probability vs. loss probability	1.64	1.46	+0.18
Calmar ratio: Return relative to maximum drawdown	3.13	2.31	+0.82
Martin ratio: Return relative to average drawdown	10.45	8.02	+2.43

MYMI vs. MUB - Sharpe Ratio Comparison

The current MYMI Sharpe Ratio is 2.65, which is comparable to the MUB Sharpe Ratio of 2.23. The chart below compares the historical Sharpe Ratios of MYMI and MUB, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MYMI vs. MUB - Drawdown Comparison

The maximum MYMI drawdown since its inception was -3.11%, smaller than the maximum MUB drawdown of -13.68%. Use the drawdown chart below to compare losses from any high point for MYMI and MUB.

Drawdown Indicators

	MYMI	MUB	Difference
Max Drawdown Largest peak-to-trough decline	-3.11%	-13.68%	+10.57%
Max Drawdown (1Y) Largest decline over 1 year	-1.39%	-2.79%	+1.40%
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	-0.17%	-0.47%	+0.30%
Average Drawdown Average peak-to-trough decline	-0.70%	-2.23%	+1.53%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.41%	0.80%	-0.39%

Volatility

MYMI vs. MUB - Volatility Comparison

The current volatility for State Street My2029 Municipal Bond ETF (MYMI) is 0.31%, while iShares National AMT-Free Muni Bond ETF (MUB) has a volatility of 0.77%. This indicates that MYMI experiences smaller price fluctuations and is considered to be less risky than MUB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MYMI	MUB	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.31%	0.77%	-0.46%
Volatility (6M) Calculated over the trailing 6-month period	1.20%	2.27%	-1.07%
Volatility (1Y) Calculated over the trailing 1-year period	1.63%	2.88%	-1.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.87%	4.07%	-1.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.87%	4.92%	-2.05%

MYMI vs. MUB - Expense Ratio Comparison

MYMI has a 0.20% expense ratio, which is higher than MUB's 0.07% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

MYMI vs. MUB - Dividend Comparison

MYMI's dividend yield for the trailing twelve months is around 2.87%, less than MUB's 3.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
MYMI State Street My2029 Municipal Bond ETF	2.87%	3.00%	0.93%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MYMI and MUB in my portfolio?

MYMI and MUB have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MYMI or MUB?

MUB has higher volatility (0.77%) compared to MYMI (0.31%). In terms of maximum drawdown, MYMI dropped -3.11% vs MUB's -13.68%.

Which ETF is better, MYMI or MUB?

On 1-year performance, MUB leads with 6.40% vs 4.31% for MYMI. On fees, MUB is cheaper at 0.07% per year. On volatility, MYMI has been the lower-risk option at 0.31%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MYMI or MUB?

Over the 1-year period, MUB has performed better with a 6.40% return vs 4.31%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MYMI or MUB?

MUB is cheaper with a 0.07% expense ratio, compared with 0.20% for MYMI.

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

MUB has the higher dividend yield at 3.17%, compared with 2.87% for MYMI.

What is the main difference between MYMI and MUB?

They also come from different issuers: State Street and iShares. Their fees differ too: 0.20% for MYMI and 0.07% for MUB.

Which has better risk-adjusted returns?

MYMI currently has the higher Sharpe Ratio (2.65 vs 2.23), 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.