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FUSIvsVMBSETF Comparison

ETF 1

FUSI

American Century Ultrashort Income ETF

This fund is part of

US Aggregate Bonds

+0.06%

Full FUSI fund page

VS

ETF 2

VMBS

Vanguard Mortgage-Backed Securities ETF

This fund is part of

MBS & ABS

+0.12%

Full VMBS fund page

American Century Ultrashort Income ETF (FUSI) belongs to the US Aggregate Bonds segment. Vanguard Mortgage-Backed Securities ETF (VMBS) is part of the MBS & ABS segment. FUSI's top 3 sector exposures are Industrials, Sovereign and Finance. In contrast, VMBS's top sector exposures are Industrials, Finance and Government Agencies. FUSI is more expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.03% for VMBS. FUSI is up 3.78% year-to-date (YTD) with +$48M in YTD flows. VMBS performs worse with -0.69% YTD performance, and +$1.86B in YTD flows. Run a side-by-side ETF comparison of FUSI and VMBS 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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FUSI vs VMBS performance and flow charts

Performance

Cumulative Flows

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Daily, global ETF data for advanced analysis or integration into apps (API), from our partner Trackinsight.

Data Services

Historic performance and flows

Data as of 11/02/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	FUSI VMBS	+0.37%+2.99%	+0.97%-0.12%	+3.78%-0.69%	+4.59%+0.14%	+17.80%+17.79%	n/a+1.08%
Flows	FUSI VMBS	+$23M+$308M	+$48M+$871M	+$48M+$1.86B	+$20M+$2.32B	+$51M-$1.35B	-+$3.09B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	FUSI VMBS	+0.27%+5.67%	+0.30%+4.39%	+0.42%+5.28%	n/a+6.51%
Max drawdown	FUSI VMBS	-0.04%-4.22%	-0.08%-5.75%	-0.32%-5.75%	n/a-16.74%
Max drawdown duration	FUSI VMBS	8d69d	4d246d	19d246d	n/a1398d

Trading data

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	FUSI	VMBS
Last sale 11/3/2026 at 7:48 PM	$50.56	$45.33
Previous close 11/02/2026	$50.56	$45.43
Consolidated volume 11/02/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of October 30, 2026

1-year trailing difference

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FUSI

is actively managed and doesn’t replicate an index

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	FUSI	VMBS
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 11/3/2026 at 7:48 PM

Live

Closed

	FUSI	VMBS
Last price	$50.56	$45.33
1D performance	+0.01%	-0.23%
AuM	$70.70 M	$16.16 B
E/R	0.19%	0.03%

Characteristics

	FUSI	VMBS
Management strategy	Active	Passive
Provider	American Century Investments	Vanguard
Benchmark	-	Bloomberg U.S. MBS Float Adjusted Index
N° of holdings	24	705
Asset class	-	Bonds
Trailing 12m distribution yield	Join	Join
Inception date	March 16, 2023	November 19, 2009
ESG	No	No

More FUSI data on Trackinsight

More VMBS data on Trackinsight

Exposure

Countries

FUSI

USA

26.63%

Other

73.37%

VMBS

USA

25.79%

Other

74.21%

Sectors

FUSI

Industrials

19.48%

Other

80.52%

VMBS

Industrials

25.38%

Other

74.62%

Diversification

FUSI

Total weight of top 15 holdings out of 15

26.81%

VMBS

Total weight of top 15 holdings out of 15

3.86%

Top 15 holdings

Data as of September 30, 2026

FUSI

USA, Notes FRN 31jan2027, USD (AX-2027)

6.45%

LCM 35A, FRN 15oct2034, USD (ABS, BR)

2.35%

Atlas Senior Loan Fund 2021-17A, FRN 20oct2034, USD (ABS, B1)

1.76%

US48257CAQ50

1.76%

US38138WAN48

1.76%

US676920AC59

1.76%

US3136BV2T46

1.48%

US30227TAC45

1.24%

Fannie Mae CAS 2022-R09, FRN 25sep2042, USD (ABS, 2M1)

1.21%

US00501DAD75

1.18%

US91684NAB73

1.18%

BX Commercial Mortgage Trust 2026-CSMO, FRN 17feb2043, USD (ABS, A)

1.18%

US34461WAA80

1.18%

US06759JBA51

1.17%

US03328WBU18

1.17%

VMBS

US01F0606A83

0.32%

US01F0626B21

0.28%

G2 MB0025, 5% 20nov2054, USD (ABS)

0.28%

US3618N56H72

0.28%

US3142J6C840

0.27%

US3618N6K636

0.26%

US3140Y9B864

0.26%

US3618N6BE68

0.26%

US21H0606A46

0.26%

G2 MB0024, 4.5% 20nov2054, USD (ABS)

0.25%

US3132E0TL66

0.24%

US3142J6DY61

0.24%

US3618N6HU47

0.23%

US3618N6FL65

0.22%

FR SD8146, 2% 1may2051, USD (ABS)

0.22%

Frequently asked questions about FUSI and VMBS

How have the FUSI and VMBS ETFs performed in 2026?

As of November 2, 2026, FUSI is up 3.78% year-to-date (YTD), while VMBS has lost -0.69%. That puts FUSI better performer ahead so far this year.

Which ETF is attracting more investor money: FUSI or VMBS?

Year-to-date, the FUSI ETF saw +$48M in flows, compared to +$1.86B for VMBS.

Which ETF is more volatile: FUSI or VMBS?

Over the past year, FUSI had a volatility of 0.3%, while VMBS experienced 4.39%.

Which ETF is bigger: FUSI or VMBS?

As of November 2, 2026, FUSI holds $70.70 M in assets under management (AUM), while VMBS manages $16.16 B.

What sectors do the FUSI and VMBS ETFs invest in?

FUSI leans toward sectors like Industrials. Meanwhile, VMBS focuses on Industrials.

What are the top holdings of the FUSI ETF and VMBS ETF?

FUSI top holdings include USA, Notes FRN 31jan2027, USD (AX-2027), LCM 35A, FRN 15oct2034, USD (ABS, BR) and Atlas Senior Loan Fund 2021-17A, FRN 20oct2034, USD (ABS, B1). VMBS holds in its top three: US01F0606A83, US01F0626B21 and G2 MB0025, 5% 20nov2054, USD (ABS).

Which ETF is more diversified: FUSI or VMBS?

FUSI holds 107 securities with 26.81% of its assets in the top 15. VMBS has 4886 securities and a top 15 weight of 3.86%.

Floating Income + Tactical Sector Management

May 3, 2023

FUSI

FUSIvsVMBSETF Comparison

American Century Ultrashort Income ETF

Vanguard Mortgage-Backed Securities ETF

FUSI vs VMBS 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 FUSI and VMBS ETFs performed in 2026?

As of November 2, 2026, FUSI is up 3.78% year-to-date (YTD), while VMBS has lost -0.69%. That puts FUSI better performer ahead so far this year.

Which ETF is attracting more investor money: FUSI or VMBS?

Year-to-date, the FUSI ETF saw +$48M in flows, compared to +$1.86B for VMBS.

Which ETF is more volatile: FUSI or VMBS?

Over the past year, FUSI had a volatility of 0.3%, while VMBS experienced 4.39%.

Which ETF is bigger: FUSI or VMBS?

As of November 2, 2026, FUSI holds $70.70 M in assets under management (AUM), while VMBS manages $16.16 B.

What sectors do the FUSI and VMBS ETFs invest in?

FUSI leans toward sectors like Industrials. Meanwhile, VMBS focuses on Industrials.

What are the top holdings of the FUSI ETF and VMBS ETF?

FUSI top holdings include USA, Notes FRN 31jan2027, USD (AX-2027), LCM 35A, FRN 15oct2034, USD (ABS, BR) and Atlas Senior Loan Fund 2021-17A, FRN 20oct2034, USD (ABS, B1). VMBS holds in its top three: US01F0606A83, US01F0626B21 and G2 MB0025, 5% 20nov2054, USD (ABS).

Which ETF is more diversified: FUSI or VMBS?

FUSI holds 107 securities with 26.81% of its assets in the top 15. VMBS has 4886 securities and a top 15 weight of 3.86%.

Floating Income + Tactical Sector Management

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