iShares MBS ETF

YTD

ALL

Why Robinhood?

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-Tracked

BBgBarc US Universal TR USD

Index-TrackedBBgBarc US Universal TR USD

What's in this fund

Sectors

As of August 19, 2025

Securitized Bonds96.16%

Cash and Equivalents3.84%

Top 10 Holdings (8.94% of total assets)

As of August 19, 2025

NameSymbol% Assets

BlackRock Cash Funds Instl SL Agency—3.94%

Federal Home Loan Mortgage Corp. 2%—1.01%

Government National Mortgage Association 6%—0.58%

Government National Mortgage Association 2%—0.54%

Federal National Mortgage Association 2%—0.51%

Federal Home Loan Mortgage Corp. 2%—0.50%

Government National Mortgage Association 2.5%—0.46%

Federal National Mortgage Association 2%—0.43%

MBB Key Statistics

AUM

40.69B

AUM40.69B

Price-Earnings ratio

—

Price-Earnings ratio—

30-Day yield

4.25

30-Day yield4.25

Average volume

2.94M

Average volume2.94M

High today

$94.10

High today$94.10

Low today

$93.59

Low today$93.59

Open price

$93.70

Open price$93.70

Volume

3.82M

Volume3.82M

52 Week high

$96.76

52 Week high$96.76

52 Week low

$90.28

52 Week low$90.28

Expense ratio

0.04

Expense ratio0.04

View Prospectus and Reports