MBB ETF

MBB ETF
$89.79
See how much of MBB you already own
Just $25 once·$99/mo·Download sample
X-ray my portfolio free

Fund Essentials - as of Sep 11, 2026

Net Assets
$36.5B
Expense Ratio
0.04%
Dividend Yield (Current)
4.34%
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-0.46%
1 Year+2.22%
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 Shares7.39%
FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 20510.97%
FNCL 5.5 10/11Fncl 5.5 10/260.89%
FNCL 5 10/11Fncl 5 10/260.74%
G2SF 5.5 9/11Ginnie Mae 5.5% 21Sep20530.71%
Top 10 Concentration: 13.42%Report Date: Sep 11, 2026
Download all 22427 holdings for MBB
CSV export with sector, industry & share changes
Get CSV

Dividend Summary

View Details →
Dividend Yield (Current)
4.34%
Frequency
Monthly
Latest Distribution
$0.34
Sep 1, 2026
12M Distributions
11 payments
Total: $3.70

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 $36.47B 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 -0.46%. The 1-year return is 2.22% and the 5-year return is 0.03%. MBB dividend yield stands at 4.34%, paid monthly.

MBB top holdings include Blackrock Cash Funds: Institutional, Sl Agency Shares (7.4%), Fhlmc 30Yr Umbs Super 2% Apr 01, 2051 (1.0%), Fncl 5.5 10/26 (0.9%), Fncl 5 10/26 (0.7%), Ginnie Mae 5.5% 21Sep2053 (0.7%). 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
+0.14%
YTD
-0.46%
1 Year
+2.22%
3 Year
+4.32%

Top 10 Holdings (13.4% of portfolio)

#TickerNameSectorWeight
1BISXXBlackrock Cash Funds: Institutional, Sl Agency SharesFinancials7.39%
2FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 2051Financials0.97%
3FNCL 5.5 10/11Fncl 5.5 10/26Financials0.89%
4FNCL 5 10/11Fncl 5 10/26Financials0.74%
5G2SF 5.5 9/11Ginnie Mae 5.5% 21Sep2053Financials0.71%
6G2SF 6 9/11Ginnie Mae 6 09/20/2053Financials0.63%
7G2SF 5 9/11Government National Mortgage Association Series 2025 5.00%, 09/01/55Financials0.55%
8G2 MB0025G2 Mb0025 5 11/20/54 2054-11-20Financials0.55%
9G2 MA7648Government National Mortgage A 2 10/20/2051Financials0.50%
10G2 MA7766Gnma2 30Yr 2% Dec 20, 2051Financials0.49%