MBB ETF

MBB ETF
$92.07
See how much of MBB you already own
Just $25 once·$99/mo·Download sample
X-ray my portfolio free

Fund Essentials - as of Oct 1, 2026

Net Assets
$35.7B
Expense Ratio
0.04%
Dividend Yield (Current)
4.51%
Holdings
22,427
Inception Date
Mar 13, 2007
Fund Family
iShares by BlackRock (US)
Investment Style
PRO
Asset Class
PRO
Legal Structure
PRO
Dividend Frequency
Monthly
SEC 30-Day Yield
PRO

Performance

YTD-4.15%
1 Year-1.69%
3 Year+4.32%
5 Year+0.03%
10 Year+1.11%

Asset Allocation

Bonds: 98.60%
Cash: 1.39%
See how much of MBB you already own
Your funds unpacked, overlap, fees and score, free on screen. The full report comes with FundXLS. Download sample.
X-ray my portfolio free

Top Holdings

View All →
TickerNameWeight
BISXXBlackrock Cash Funds: Institutional, Sl Agency Shares5.09%
FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 20511.04%
G2SF 6 10/11Ginnie Mae 60.68%
FNCL 5.5 10/11Fannie Mae Or Freddie Mac 2050-10-010.60%
G2 MB0025Gnma Ii 30Yr Pool#Mb00250.59%
Top 10 Concentration: 10.67%Report Date: Oct 1, 2026
Download all 22427 holdings for MBB
CSV export with sector, industry & share changes
Get CSV

Dividend Summary

View Details →
Dividend Yield (Current)
4.51%
Frequency
Monthly
Latest Distribution
$0.37
Oct 1, 2026
12M Distributions
11 payments
Total: $3.73

Peer Comparison

Benchmark
PRO
Peer outperformance: PRO
Category rank: PRO
This ETF
PRO
Peer Avg
PRO

MBB ETF Overview

MBB ETF (iShares MBS ETF) is managed by iShares by BlackRock (US) with $35.72B in net assets. MBB expense ratio is 0.04%, holding 22427 positions across sectors including Financials. Inception date: 2007-03-13.

MBB performance shows a YTD return of -4.15%. The 1-year return is -1.69% and the 5-year return is 0.03%. MBB dividend yield stands at 4.51%, paid monthly.

MBB top holdings include Blackrock Cash Funds: Institutional, Sl Agency Shares (5.1%), Fhlmc 30Yr Umbs Super 2% Apr 01, 2051 (1.0%), Ginnie Mae 6 (0.7%), Fannie Mae Or Freddie Mac 2050-10-01 (0.6%), Gnma Ii 30Yr Pool#Mb0025 (0.6%). Go to all MBB holdings, MBB sectors, or MBB dividends.

MBB can be compared against other funds. Use MBB overlap to find shared positions, or MBB vs another fund for a side-by-side view. MBB alternatives are available via the screener, along with tax-loss harvesting opportunities.

1 Month
-3.71%
YTD
-4.15%
1 Year
-1.69%
3 Year
+4.32%

Top 10 Holdings (10.7% of portfolio)

#TickerNameSectorWeight
1BISXXBlackrock Cash Funds: Institutional, Sl Agency SharesFinancials5.09%
2FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 2051Financials1.04%
3G2SF 6 10/11Ginnie Mae 6Financials0.68%
4FNCL 5.5 10/11Fannie Mae Or Freddie Mac 2050-10-01Financials0.60%
5G2 MB0025Gnma Ii 30Yr Pool#Mb0025Financials0.59%
6G2SF 5.5 10/11Government National Mortgage AssociationFinancials0.57%
7G2 MA7648Government National Mortgage A 2 10/20/2051Financials0.54%
8G2 MA7766Gnma2 30Yr 2% Dec 20, 2051Financials0.53%
9FN MA4492Fannie Mae Pool 2.0% 12/01/2051Financials0.52%
10G2 MA7472Gnma Ii P#Ma7472 2.5% 07/20/51Financials0.51%