FUSIvsMBBAETF Comparison
ETF 1
FUSI
American Century Multisector Floating Income ETF
This fund is part of
US Aggregate Bonds
-0.32%
VS
American Century Multisector Floating Income ETF (FUSI) belongs to the US Aggregate Bonds segment. iShares Mortgage-Backed Securities Active ETF (MBBA) is part of the MBS & ABS segment. FUSI's top 2 sector exposures are Industrials and Sovereign. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. FUSI is less expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.26% for MBBA. Run a side-by-side ETF comparison of FUSI and MBBA 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 MBBA performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/18/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | FUSI MBBA | +0.31%-1.87% | +1.05%-2.54% | +3.32%n/a | +4.73%n/a | +17.99%n/a | n/an/a |
| Flows | FUSI MBBA | +$15M+$11M | +$18M+$17M | +$18M- | -$10M- | +$20M- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | FUSI MBBA | +0.23%+4.90% | +0.29%n/a | +0.41%n/a | n/an/a |
| Max drawdown | FUSI MBBA | -0.02%-3.24% | -0.08%n/a | -0.32%n/a | n/an/a |
| Max drawdown duration | FUSI MBBA | 3d81d | 4dn/a | 19dn/a | n/an/a |
Trading data
FUSI | MBBA | |
Last sale 9/18/2026 at 1:30 PM | $50.46 | $47.82 |
| Previous close 09/17/2026 | $50.43 | $48.15 |
| Consolidated volume 09/17/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
Last update 9/18/2026 at 1:30 PM
Live
Closed
FUSI | MBBA | |
|---|---|---|
| Last price | $50.46 | $47.82 |
| 1D performance | +0.05% | -0.69% |
| AuM | $40.33 M | $164.54 M |
| E/R | 0.19% | 0.26% |
Characteristics
FUSI | MBBA | |
|---|---|---|
| Management strategy | Active | Active |
| Provider | American Century Investments | iShares |
| Benchmark | - | - |
| N° of holdings | 17 | 25 |
| Asset class | - | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | March 16, 2023 | January 23, 2026 |
| ESG | No | No |
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Exposure
Countries
FUSI
USA
33.18%
Other
66.82%
MBBA
Data will be available soon
Sectors
FUSI
Industrials
23.26%
Sovereign
9.92%
Other
66.82%
MBBA
Data will be available soon
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Diversification
FUSI
Total weight of top 15 holdings out of 15
45.28%
MBBA
Data will be available soon
Top 15 holdings
Data as of July 31, 2026
FUSI
USA, Notes FRN 31jan2027, USD (AX-2027)
9.92%
LCM 35A, FRN 15oct2034, USD (ABS, BR)
4.41%
Atlas Senior Loan Fund 2021-17A, FRN 20oct2034, USD (ABS, B1)
3.31%
US3136BV2T46
2.98%
US12659VAA89
2.51%
US48251FAJ03
2.25%
US929342AA13
2.23%
BX Commercial Mortgage Trust 2026-CSMO, FRN 17feb2043, USD (ABS, A)
2.21%
Brant Point CLO 2023-1A, FRN 26jul2038, USD (ABS, BR)
2.21%
US559916AG67
2.21%
TPG Real Estate Finance Issuer 2025-FL6, FRN 18sep2042, USD (ABS, A)
2.21%
US55819GBC24
2.21%
US05594VAC63
2.21%
US883932AS42
2.21%
US87168YAS90
2.21%
MBBA
Data will be available soon
Frequently asked questions about FUSI and MBBA
Which ETF is bigger: FUSI or MBBA?
As of September 18, 2026, FUSI holds $40.33 M in assets under management (AUM), while MBBA manages $164.54 M.
What sectors do the FUSI and MBBA ETFs invest in?
FUSI leans toward sectors like Industrials and Sovereign. Meanwhile, MBBA focuses on Industrials and Non-Corporate.
What are the top holdings of the FUSI ETF and MBBA 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). MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.
Which ETF is more diversified: FUSI or MBBA?
FUSI holds 61 securities with 45.28% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.
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Latest news about FUSI & MBBA
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