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, Non-Corporate and Utilities. 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 10/16/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | ASEC MBBA | +0.08%-0.54% | -0.34%-2.81% | n/an/a | n/an/a | n/an/a | n/an/a |
| Flows | ASEC MBBA | -+$572M | -+$579M | -- | -- | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | ASEC MBBA | +1.68%+5.79% | n/an/a | n/an/a | n/an/a |
| Max drawdown | ASEC MBBA | -1.32%-4.67% | n/an/a | n/an/a | n/an/a |
| Max drawdown duration | ASEC MBBA | 52d52d | n/an/a | n/an/a | n/an/a |
Trading data
ASEC | MBBA | |
Last sale 10/16/2026 at 1:30 PM | $49.14 | $47.49 |
| Previous close 10/15/2026 | $49.10 | $47.54 |
| Consolidated volume 10/15/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
Last update 10/16/2026 at 1:30 PM
Live
Closed
ASEC | MBBA | |
|---|---|---|
| Last price | $49.14 | $47.49 |
| 1D performance | +0.08% | -0.11% |
| AuM | $19.67 M | $725.38 M |
| E/R | 0.29% | 0.26% |
Characteristics
ASEC | MBBA | |
|---|---|---|
| Management strategy | Active | Active |
| Provider | American Century Investments | iShares |
| Benchmark | - | - |
| N° of holdings | 9 | 26 |
| 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
9.71%
Other
90.29%
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
18.24%
MBBA
Data will be available soon
Top 15 holdings
Data as of August 31, 2026
ASEC
State Street Institutional US Government Money Market Fund
2.25%
USA, Notes 3.875% 15may2029, USD (AN-2029)
1.77%
US86772YAA82
1.34%
US749427AC45
1.25%
US86746AAA34
1.17%
US552339AA18
1.16%
US74332XAE13
1.12%
Mosaic Solar Loan Trust 2025-1A, 6.12% 22aug2050, USD (ABS, A)
1.12%
US618933AA33
1.02%
US233636AG43
1.02%
SCE Recovery Funding, 6.093% 15jun2059, USD (2026-A, A-3)
1.01%
Consolidated Communications 2025-1A, 6% 20may2030, USD (ABS, A2)
1.00%
US92535VAU61
1.00%
US36272EAE41
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 October 16, 2026, ASEC holds $19.67 M in assets under management (AUM), while MBBA manages $725.38 M.
What are the top holdings of the ASEC ETF and MBBA ETF?
ASEC top holdings include State Street Institutional US Government Money Market Fund, USA, Notes 3.875% 15may2029, USD (AN-2029) and US86772YAA82. MBBA holds in its top three: US01F0206A20, US01F0226A83 and US01F0526982.
Which ETF is more diversified: ASEC or MBBA?
ASEC holds 106 securities with 18.24% of its assets in the top 15. MBBA has 506 securities and a top 15 weight of 85.37%.
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