MBB ETF

MBB ETF
$91.22
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 1, 2026

Net Assets
$39.4B
Expense Ratio
0.04%
Dividend Yield (Current)
4.34%
Holdings
11,186
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-0.60%
1 Year+3.70%
3 Year+4.09%
5 Year+0.05%
10 Year+1.14%

Asset Allocation

Bonds: 99.58%
Cash: 0.42%
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 Shares7.65%
FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 20510.98%
FNCL 5.5 9/11Umbs 30Yr Tba(Reg A) 5.50 09/16/20540.89%
FNCL 5 9/11Fncl 5.00 09/26 Tba 5 2056-09-010.87%
G2SF 5.5 9/11Ginnie Mae 5.5% 21Sep20530.86%
Top 10 Concentration: 13.99%Report Date: Sep 1, 2026
Download all 11186 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
12 payments
Total: $4.04

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 $39.36B in net assets. MBB expense ratio is 0.04%, holding 11186 positions across sectors including Financials, Energy. Inception date: 2007-03-13.

MBB performance shows a YTD return of -0.60%. The 1-year return is 3.70% and the 5-year return is 0.05%. MBB dividend yield stands at 4.34%, paid monthly.

MBB top holdings include Blackrock Cash Funds: Institutional, Sl Agency Shares (7.7%), Fhlmc 30Yr Umbs Super 2% Apr 01, 2051 (1.0%), Umbs 30Yr Tba(Reg A) 5.50 09/16/2054 (0.9%), Fncl 5.00 09/26 Tba 5 2056-09-01 (0.9%), Ginnie Mae 5.5% 21Sep2053 (0.9%). 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
-1.77%
YTD
-0.60%
1 Year
+3.70%
3 Year
+4.09%

Top 10 Holdings (14.0% of portfolio)

#TickerNameSectorWeight
1BISXXBlackrock Cash Funds: Institutional, Sl Agency SharesFinancials7.65%
2FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 2051Financials0.98%
3FNCL 5.5 9/11Umbs 30Yr Tba(Reg A) 5.50 09/16/2054Financials0.89%
4FNCL 5 9/11Fncl 5.00 09/26 Tba 5 2056-09-01Financials0.87%
5G2SF 5.5 9/11Ginnie Mae 5.5% 21Sep2053Financials0.86%
6G2SF 6 9/11Ginnie Mae 6% 09/15/2053Financials0.63%
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 10/20/2051Financials0.51%
10G2 MA7766Gnma2 30Yr 2% Dec 20, 2051Financials0.50%