iShares MBS ETF
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Robinhood gives you the tools you need to put your money in motion. You can buy or sell MBB and other ETFs, options, and stocks.About MBB
MBB tracks a market-weighted index of investment-grade mortgage pass-through securities. The index includes fixed and floating rate securities issued by GNMA, FNMA and FHLMC.
Index-TrackedBBgBarc US Universal TR USD
Index-TrackedBBgBarc US Universal TR USD
CategoryGovernment Mortgage-Backed Bond
CategoryGovernment Mortgage-Backed Bond
Number of holdings11,171
Number of holdings11,171
Inception DateMar 13, 2007
Inception DateMar 13, 2007
What's in this fund
Sectors
As of January 20, 2026Securitized Bonds95.64%
Cash and Equivalents4.36%
Top 10 Holdings (10.11% of total assets)
As of January 20, 2026NameSymbol% Assets
BlackRock Cash Funds Instl SL Agency—4.49%
Federal Home Loan Mortgage Corp. 2%—1.07%
Government National Mortgage Association 5.5%—0.99%
Government National Mortgage Association 2%—0.55%
Government National Mortgage Association 2%—0.55%
Federal Home Loan Mortgage Corp. 2%—0.53%
Federal Home Loan Mortgage Corp. 2%—0.51%
Government National Mortgage Association 5%—0.49%
Government National Mortgage Association 2.5%—0.47%
Government National Mortgage Association 6%—0.46%
MBB Key Statistics
AUM39.36B
AUM39.36B
Price-Earnings ratio—
Price-Earnings ratio—
30-Day yield4.12
30-Day yield4.12
Average volume4.52M
Average volume4.52M
High today$95.56
High today$95.56
Low today$95.40
Low today$95.40
Open price$95.46
Open price$95.46
Volume679.51K
Volume679.51K
52 Week high$96.25
52 Week high$96.25
52 Week low$90.84
52 Week low$90.84
Expense ratio0.04
Expense ratio0.04
Stock Snapshot
As of today, iShares MBS ETF(MBB) shares are valued at $95.45. The company's market cap stands at 39.33B, with a dividend yield of 2.6%.
On 2026-01-23, iShares MBS ETF(MBB) stock moved within a range of $95.40 to $95.56. With shares now at $95.45, the stock is trading +0.1% above its intraday low and -0.1% below the session's peak.
Trading volume for iShares MBS ETF(MBB) stock has reached 679.51K, versus its average volume of 4.52M.
Over the past 52 weeks, iShares MBS ETF(MBB) stock has traded between a high of $96.25 and a low of $90.84.
Over the past 52 weeks, iShares MBS ETF(MBB) stock has traded between a high of $96.25 and a low of $90.84.