iShares Mortgage-Backed Securities Active ETF (MBBA) holdings
Top holdings
The 10 largest positions make up 94.3% of the fund, as reported on Oct 14, 2026.
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Frequently asked questions
What are the top holdings of MBBA?
As of Oct 14, 2026, the largest positions in iShares Mortgage-Backed Securities Active ETF are BlackRock Cash Funds Treasury SL Agency Shares (47.4%), UMBS TBA 30yr 5.5% November Delivery 5.500% 01-JUN-2056 (12.7%), UMBS TBA 30yr 6% November Delivery 6.000% 01-JUL-2056 (6.2%), FHLMC 30yr Pool#SL6270 2.000% 01-Aug-2052 2.0% 01-AUG-2052 (5.0%), GNMA II TBA 30yr 2% October Delivery 2.000% 01-AUG-2051 (4.8%).
How concentrated is MBBA?
The 10 largest positions make up 94.3% of iShares Mortgage-Backed Securities Active ETF, as reported on Oct 14, 2026.
Fund holdings are reported periodically and are a snapshot of a past date, not a live position list — what the fund holds today may differ. Weights cover only the largest positions shown, not the whole portfolio.
This page is for informational purposes only. Nothing on it is a recommendation, solicitation or offer to buy or sell any security, nor investment, legal or tax advice. Light Horse Securities Inc does not verify third-party data and is not responsible for its accuracy, completeness or timeliness.