MYMK vs. BIL

Last updated Jun 4, 2026

MYMK (SPDR SSGA My2031 Municipal Bond ETF) and BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) are both exchange-traded funds - MYMK is a Municipal Bonds fund actively managed by State Street, while BIL is a Government Bonds fund tracking the Bloomberg 1-3 Month U.S. Treasury Bill Index. MYMK is actively managed, while BIL is passively managed. At a correlation of -0.05, they often move in opposite directions. MYMK charges 0.20%/yr vs 0.14%/yr for BIL.

Performance

MYMK vs. BIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SPDR SSGA My2031 Municipal Bond ETF (MYMK) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MYMK achieves a 0.76% return, which is significantly lower than BIL's 1.49% return.

MYMK

• 1D: -0.04%
• 1M: 0.33%
• YTD: 0.76%
• 6M: 1.03%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

BIL

• 1D: 0.00%
• 1M: 0.27%
• YTD: 1.49%
• 6M: 1.76%
• 1Y: 3.87%
• 3Y*: 4.64%
• 5Y*: 3.41%
• 10Y*: 2.18%

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

MYMK vs. BIL - Yearly Performance Comparison

	2026 (YTD)	2025
MYMK SPDR SSGA My2031 Municipal Bond ETF	0.76%	0.77%
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	1.49%	1.11%

Correlation

The correlation between MYMK and BIL is -0.05, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (All Time) Calculated using the full available price history since Sep 18, 2025	-0.05

Return for Risk

MYMK vs. BIL — Risk / Return Rank

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

BIL

BIL Risk / Return Rank: 100
BIL Sharpe Ratio Rank: 100
BIL Sortino Ratio Rank: 100
BIL Omega Ratio Rank: 100
BIL Calmar Ratio Rank: 100
BIL Martin Ratio Rank: 100

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.

MYMK vs. BIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SPDR SSGA My2031 Municipal Bond ETF (MYMK) and SPDR Bloomberg 1-3 Month T-Bill ETF (BIL). 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

	MYMK	BIL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	19.71	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	13.15	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	8.51	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.11	2.78	-1.66

Drawdowns

MYMK vs. BIL - Drawdown Comparison

The maximum MYMK drawdown since its inception was -2.22%, which is greater than BIL's maximum drawdown of -0.78%. Use the drawdown chart below to compare losses from any high point for MYMK and BIL.

Drawdown Indicators

	MYMK	BIL	Difference
Max Drawdown Largest peak-to-trough decline	-2.22%	-0.78%	-1.44%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.01%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-0.01%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-0.10%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-0.21%	—
Current Drawdown Current decline from peak	-1.06%	0.00%	-1.06%
Average Drawdown Average peak-to-trough decline	-0.57%	-0.26%	-0.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.00%	—

Volatility

Volatility by Period

	MYMK	BIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.06%	—
Volatility (6M) Calculated over the trailing 6-month period	—	0.13%	—
Volatility (1Y) Calculated over the trailing 1-year period	1.97%	0.20%	+1.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.97%	0.26%	+1.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.97%	0.26%	+1.71%

MYMK vs. BIL - Expense Ratio Comparison

MYMK has a 0.20% expense ratio, which is higher than BIL's 0.14% 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

MYMK vs. BIL - Dividend Comparison

MYMK's dividend yield for the trailing twelve months is around 1.84%, less than BIL's 3.86% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
BIL SPDR Bloomberg 1-3 Month T-Bill ETF	3.86%	4.13%	5.03%	4.92%	1.35%	0.00%	0.30%	2.05%	1.66%	0.68%	0.07%
MYMK SPDR SSGA My2031 Municipal Bond ETF	1.84%	0.77%	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 MYMK and BIL in my portfolio?

MYMK and BIL have a correlation of -0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, MYMK or BIL?

On fees, BIL is cheaper at 0.14% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, MYMK or BIL?

BIL is cheaper with a 0.14% expense ratio, compared with 0.20% for MYMK.

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

BIL has the higher dividend yield at 3.86%, compared with 1.84% for MYMK.

What is the main difference between MYMK and BIL?

MYMK is categorized as Municipal Bonds, while BIL is Government Bonds. Their fees differ too: 0.20% for MYMK and 0.14% for BIL.