BILvsBAMUETF Comparison

ETF 1

BIL

State Street SPDR Bloomberg 1-3 Month T-Bill ETF

This fund is part of

Money Market Bonds

+0.02%

Full BIL fund page

ETF 2

BAMU

Brookstone Ultra-Short Bond ETF

This fund is part of

US Aggregate Bonds

-0.16%

Full BAMU fund page

State Street SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) belongs to the Money Market Bonds segment. Brookstone Ultra-Short Bond ETF (BAMU) is part of the US Aggregate Bonds segment. BIL's top 1 sector exposures are Sovereign. In contrast, BAMU's top sector exposures are Sovereign and Non-Corporate. BIL is less expensive with a Total Expense Ratio (TER) of 0.1353%, versus 1.02% for BAMU. BIL is up 2.94% year-to-date (YTD) with +$8.50B in YTD flows. BAMU performs worse with 2.1% YTD performance, and -$6M in YTD flows. Run a side-by-side ETF comparison of BIL and BAMU below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.

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BIL vs BAMU performance and flow charts

Performance

Cumulative Flows

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Data Services

Historic performance and flows

Data as of 10/23/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	BIL BAMU	+0.35%+0.24%	+0.95%+0.69%	+2.94%+2.10%	+3.69%+2.71%	+13.93%+10.78%	+19.98%n/a
Flows	BIL BAMU	+$2.94B-	+$4.21B-$2M	+$8.50B-$6M	+$8.67B-$8M	+$16.92B+$62M	+$38.18B-

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	BIL BAMU	+0.15%+0.28%	+0.15%+0.30%	+0.19%+0.34%	+0.20%n/a
Max drawdown	BIL BAMU	n/an/a	n/an/a	n/a-0.04%	-0.04%n/a
Max drawdown duration	BIL BAMU	n/an/a	n/an/a	n/a2d	204dn/a

Trading data

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	BIL	BAMU
Last sale 10/23/2026 at 1:30 PM	$91.63	$25.29
Previous close 10/22/2026	$91.60	$25.28
Consolidated volume 10/22/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of September 30, 2026

1-year trailing difference

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BAMU

is actively managed and doesn’t replicate an index

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	BIL	BAMU
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 10/23/2026 at 1:30 PM

Live

Closed

	BIL	BAMU
Last price	$91.63	$25.29
1D performance	+0.03%	+0.04%
AuM	$51.32 B	$65.70 M
E/R	0.1353%	1.02%

Characteristics

	BIL	BAMU
Management strategy	Passive	Active
Provider	State Street Investment Management	Brookstone Asset Management
Benchmark	Bloomberg U.S. Treasury Bills 1-3 Months Index	-
N° of holdings	18	93
Asset class	Fixed Income	-
Trailing 12m distribution yield	Join	Join
Inception date	May 25, 2007	September 27, 2023
ESG	No	No

More BIL data on Trackinsight

More BAMU data on Trackinsight

Exposure

Countries

BIL

USA

99.46%

Other

0.54%

BAMU

USA

98.9%

Other

1.1%

Sectors

BIL

Sovereign

99.46%

Other

0.54%

BAMU

Sovereign

95.3%

Other

4.7%

Diversification

BIL

Total weight of top 15 holdings out of 15

93.7%

BAMU

Total weight of top 15 holdings out of 15

39.58%

Top 15 holdings

Data as of August 31, 2026

BIL

USA, Bills 0% 29oct2026, USD (364D)

10.18%

USA, Bills 0% 8oct2026, USD (182D)

9.98%

USA, Bills 0% 27nov2026, USD (364D)

8.39%

USA, Bills 0% 22oct2026, USD (182D)

6.92%

USA, Bills 0% 6oct2026, USD (119D)

6.63%

USA, Bills 0% 5nov2026, USD (182D)

6.30%

USA, Bills 0% 12nov2026, USD (182D)

6.30%

USA, Bills 0% 19nov2026, USD (182D)

6.29%

USA, Bills 0% 15oct2026, USD (182D)

6.29%

USA, Bills 0% 13oct2026, USD (119D)

6.25%

USA, Bills 0% 20oct2026, USD (119D)

5.98%

USA, Bills 0% 27oct2026, USD (119D)

4.71%

USA, Bills 0% 10nov2026, USD (119D)

4.22%

USA, Bills 0% 17nov2026, USD (119D)

2.73%

USA, Bills 0% 3nov2026, USD (119D)

2.52%

BAMU

BlackRock Cash Funds - Treasury

3.61%

USA, Bills 0% 20oct2026, USD (119D)

3.57%

USA, Bills 0% 13oct2026, USD (119D)

3.29%

USA, Bills 0% 29oct2026, USD (364D)

3.18%

USA, Bills 0% 27oct2026, USD (119D)

2.65%

USA, Bills 0% 8oct2026, USD (182D)

2.56%

USA, Bills 0% 15oct2026, USD (182D)

2.45%

USA, Bills 0% 27nov2026, USD (364D)

2.43%

USA, Notes 3.5% 30sep2026, USD (BH-2026)

2.39%

USA, Bills 0% 22oct2026, USD (182D)

2.35%

USA, Bills 0% 5nov2026, USD (182D)

2.33%

USA, Bills 0% 19nov2026, USD (182D)

2.31%

USA, Bills 0% 6oct2026, USD (119D)

2.28%

USA, Notes 4.125% 31oct2026, USD (BJ-2026)

2.12%

USA, Notes 0.875% 30sep2026, USD (AD-2026)

2.07%

Frequently asked questions about BIL and BAMU

How have the BIL and BAMU ETFs performed in 2026?

As of October 23, 2026, BIL is up 2.94% year-to-date (YTD), while BAMU has returned 2.1%. That puts BIL better performer ahead so far this year.

Which ETF is attracting more investor money: BIL or BAMU?

Year-to-date, the BIL ETF saw +$8.50B in flows, compared to -$6M for BAMU.

Which ETF is more volatile: BIL or BAMU?

Over the past year, BIL had a volatility of 0.15%, while BAMU experienced 0.3%.

Which ETF is bigger: BIL or BAMU?

As of October 23, 2026, BIL holds $51.32 B in assets under management (AUM), while BAMU manages $65.70 M.

What sectors do the BIL and BAMU ETFs invest in?

BIL leans toward sectors like Sovereign. Meanwhile, BAMU focuses on Sovereign.

What are the top holdings of the BIL ETF and BAMU ETF?

BIL top holdings include USA, Bills 0% 29oct2026, USD (364D), USA, Bills 0% 8oct2026, USD (182D) and USA, Bills 0% 27nov2026, USD (364D). BAMU holds in its top three: BlackRock Cash Funds - Treasury, USA, Bills 0% 20oct2026, USD (119D) and USA, Bills 0% 13oct2026, USD (119D).

BILvsBAMUETF Comparison

State Street SPDR Bloomberg 1-3 Month T-Bill ETF

Brookstone Ultra-Short Bond ETF

BIL vs BAMU performance and flow charts

Performance

Cumulative Flows

Get all the metrics on this page, and more, through a reliable ETF data feed

Countries

Sectors

Diversification

Top 15 holdings

How have the BIL and BAMU ETFs performed in 2026?

As of October 23, 2026, BIL is up 2.94% year-to-date (YTD), while BAMU has returned 2.1%. That puts BIL better performer ahead so far this year.

Which ETF is attracting more investor money: BIL or BAMU?

Year-to-date, the BIL ETF saw +$8.50B in flows, compared to -$6M for BAMU.

Which ETF is more volatile: BIL or BAMU?

Over the past year, BIL had a volatility of 0.15%, while BAMU experienced 0.3%.

Which ETF is bigger: BIL or BAMU?

As of October 23, 2026, BIL holds $51.32 B in assets under management (AUM), while BAMU manages $65.70 M.

What sectors do the BIL and BAMU ETFs invest in?

BIL leans toward sectors like Sovereign. Meanwhile, BAMU focuses on Sovereign.

What are the top holdings of the BIL ETF and BAMU ETF?

BIL top holdings include USA, Bills 0% 29oct2026, USD (364D), USA, Bills 0% 8oct2026, USD (182D) and USA, Bills 0% 27nov2026, USD (364D). BAMU holds in its top three: BlackRock Cash Funds - Treasury, USA, Bills 0% 20oct2026, USD (119D) and USA, Bills 0% 13oct2026, USD (119D).

Which ETF is more diversified: BIL or BAMU?

BIL holds 18 securities with 93.7% of its assets in the top 15. BAMU has 98 securities and a top 15 weight of 39.58%.

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