Key stats
About iShares Mortgage-Backed Securities Active ETF
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Inception date
Jan 23, 2026
Structure
Open-Ended Fund
Replication method
Synthetic
Dividend treatment
Distributes
Distribution tax treatment
Ordinary income
Income tax type
Capital Gains
Max ST capital gains rate
39.60%
Max LT capital gains rate
20.00%
Primary advisor
BlackRock Fund Advisors
Distributor
BlackRock Investments LLC
Identifiers
3
ISIN US0925287932
MBBA is an actively managed ETF that aims to maximize total return, consistent with income generation and prudent management. The fund invests primarily in mortgage-backed securities (MBS) and derivatives offering similar exposure or related market risks. Holdings may include Government National Mortgage Association (GNMA), Fannie Mae, Freddie Mac, other US government securities, and participation in to be announced (TBA) MBS transactions. The fund targets an average portfolio duration close (plus or minus one year) to its benchmark, the Bloomberg U.S. MBS Index. It may invest in residential/commercial MBS and other asset-backed securities, use options, futures, swaps, and interest rate transactions for exposure, risk mitigation, or return enhancement. As an actively managed ETF, the fund manager has full discretion to adjust the portfolio at any time.
Related funds
Classification
What's in the fund
Exposure type
Securitized
Stock breakdown by region
Top 10 holdings
Frequently Asked Questions
An exchange-traded fund (ETF) is a collection of assets (stocks, bonds, commodities, etc.) that track an underlying index and can be bought on an exchange like individual stocks.
MBBA trades at 50.10 USD today, its price has fallen −0.04% in the past 24 hours. Track more dynamics on MBBA price chart.
MBBA assets under management is 129.72 M USD. AUM is an important metric as it reflects the fund's size and can serve as a gauge of how successful the fund is in attracting investors, which, in its turn, can influence decision-making.
MBBA fund flows account for 0.00 USD (1 year). Many traders use this metric to get insight into investors' sentiment and evaluate whether it's time to buy or sell the fund.
Since ETFs work like an individual stock, they can be bought and sold on exchanges (e.g. NASDAQ, NYSE, EURONEXT). As it happens with stocks, you need to select a brokerage to access trading. Explore our list of available brokers to find the one to help execute your strategies. Don't forget to do your research before getting to trading. Explore ETFs metrics in our ETF screener to find a reliable opportunity.
MBBA invests in bonds. See more details in our Analysis section.
MBBA expense ratio is 0.25%. It's an important metric for helping traders understand the fund's operating costs relative to assets and how expensive it would be to hold the fund.
No, MBBA isn't leveraged, meaning it doesn't use borrowings or financial derivatives to magnify the performance of the underlying assets or index it follows.
No, MBBA doesn't pay dividends to its holders.
MBBA trades at a premium (0.12%).
Premium/discount to NAV expresses the difference between the ETF’s price and its NAV value. A positive percentage indicates a premium, meaning the ETF trades at a higher price than the calculated NAV. Conversely, a negative percentage indicates a discount, suggesting the ETF trades at a lower price than NAV.
Premium/discount to NAV expresses the difference between the ETF’s price and its NAV value. A positive percentage indicates a premium, meaning the ETF trades at a higher price than the calculated NAV. Conversely, a negative percentage indicates a discount, suggesting the ETF trades at a lower price than NAV.
MBBA shares are issued by BlackRock, Inc.
MBBA follows the No Underlying Index. ETFs usually track some benchmark seeking to replicate its performance and guide asset selection and objectives.
The fund started trading on Jan 23, 2026.
The fund's management style is active, aiming to outperform its benchmark index by actively selecting and adjusting assets. The goal is to achieve returns that exceed those of the index the fund tracks.