ASECvsMBBAETF Comparison
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American Century Securitized Credit ETF (ASEC) and iShares Mortgage-Backed Securities Active ETF (MBBA) have similar underlying exposures to countries and sectors. They also belong to the same industry segment: MBS & ABS. ASEC's top 3 sector exposures are Industrials, Sovereign and Non-Corporate. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. ASEC is more expensive with a Total Expense Ratio (TER) of 0.29%, versus 0.26% for MBBA. Run a side-by-side ETF comparison of ASEC 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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ASEC vs MBBA performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | ASEC MBBA | +0.07%-0.09% | +0.50%-1.02% | n/an/a | n/an/a | n/an/a | n/an/a |
| Flows | ASEC MBBA | -+$5M | -+$35M | -- | -- | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | ASEC MBBA | +1.57%+4.75% | n/an/a | n/an/a | n/an/a |
| Max drawdown | ASEC MBBA | -0.41%-2.02% | n/an/a | n/an/a | n/an/a |
| Max drawdown duration | ASEC MBBA | 7d65d | n/an/a | n/an/a | n/an/a |
Trading data
ASEC | MBBA | |
Last sale 9/2/2026 at 1:30 PM | $49.84 | $48.77 |
| Previous close 09/02/2026 | $49.89 | $48.54 |
| Consolidated volume 09/02/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
Last update 9/2/2026 at 1:30 PM
Live
Closed
ASEC | MBBA | |
|---|---|---|
| Last price | $49.84 | $48.77 |
| 1D performance | -0.10% | +0.48% |
| AuM | $19.93 M | $156.37 M |
| E/R | 0.29% | 0.26% |
Characteristics
ASEC | MBBA | |
|---|---|---|
| Management strategy | Active | Active |
| Provider | American Century Investments | iShares |
| Benchmark | - | - |
| N° of holdings | 7 | 25 |
| Asset class | - | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | May 27, 2026 | January 23, 2026 |
| ESG | No | No |
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Exposure
Countries
ASEC
USA
8.53%
Other
91.47%
MBBA
Data will be available soon
Sectors
ASEC
Other
100%
MBBA
Data will be available soon
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Diversification
ASEC
Total weight of top 15 holdings out of 15
18.62%
MBBA
Data will be available soon
Top 15 holdings
Data as of July 31, 2026
ASEC
USA, Notes 3.875% 15may2029, USD (AN-2029)
3.73%
US749427AC45
1.24%
US552339AA18
1.15%
Mosaic Solar Loan Trust 2025-1A, 6.12% 22aug2050, USD (ABS, A)
1.13%
US08860AAA79
1.13%
US74332XAE13
1.12%
US618933AA33
1.03%
US55389QAB32
1.03%
State Street Institutional US Government Money Market Fund
1.03%
US69544NAD93
1.01%
US22758FAF18
1.01%
Consolidated Communications 2025-1A, 6% 20may2030, USD (ABS, A2)
1.00%
US36272EAE41
1.00%
US92535VAU61
1.00%
US66981PAR91
1.00%
MBBA
Data will be available soon
Frequently asked questions about ASEC and MBBA
Which ETF is bigger: ASEC or MBBA?
As of September 1, 2026, ASEC holds $19.93 M in assets under management (AUM), while MBBA manages $156.37 M.
What are the top holdings of the ASEC ETF and MBBA ETF?
ASEC top holdings include USA, Notes 3.875% 15may2029, USD (AN-2029), US749427AC45 and US552339AA18. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.
Which ETF is more diversified: ASEC or MBBA?
ASEC holds 105 securities with 18.62% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.
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