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

MBB holds 14.0% of its assets in its 10 largest positions as of Sep 1, 2026. MBB is iShares MBS ETF.

Showing the top 10 of 11,186 holdings · as of Sep 1, 2026
Top 10 weight
13.99%
MBB top 10 holdings, by weight
#TickerNameWeightCumulativeMkt valueSectorIndustry
1
BISXX
Blackrock Cash Funds: Institutional, Sl Agency SharesFinancials · Capital Markets
7.65%		7.7%$3.01BFinancialsCapital Markets
2—Fhlmc 30Yr Umbs Super 2% Apr 01, 2051Financials · Thrifts
0.98%		8.6%$384.64MFinancialsThrifts
Sector and industry · Pro
3DebtUmbs 30Yr Tba(Reg A)
0.89%		9.5%$349.47M
4—Fncl 5.00 09/26 Tba 5 2056-09-01
0.87%		10.4%$342.81M
5—Ginnie Mae 5.5% 21Sep2053
0.86%		11.3%$339.49M
6DebtGinnie Mae
0.63%		11.9%$247.57M
7—Government National Mortgage Association Series 2025 5.00%, 09/01/55
0.55%		12.4%$215.54M
8Debt-
0.55%		13.0%$217.06M
9DebtGovernment National Mortgage A
0.51%		13.5%$199.08M
10—Gnma2 30Yr 2% Dec 20, 2051
0.50%		14.0%$195.69M
More holdings · Pro
FundXLS Pro
See the other 11,176 holdings of MBB
X-ray every fund you own at once, ETFs and mutual funds that hold stocks directly, and see how much of your money lands on the same stocks twice.
Unlock FundXLS Pro$45/quarter Pro · Cancel anytime
Themes in the top 10
Asset ManagementETF ProvidersInvestment TechnologyLending & CreditMarket InfrastructureGlobal BankingInterest RatesDerivatives TradingInflation ProtectionInfrastructureSupply Chain

MBB ETF Top Holdings

MBB holdings top 10 positions. The top 10 holdings account for 14.0% of the fund, led by Blackrock Cash Funds: Institutional, Sl Agency Shares at 7.7%, Fhlmc 30Yr Umbs Super 2% Apr 01, 2051 at 1.0%, Umbs 30Yr Tba(Reg A) 5.50 09/16/2054 at 0.9%.

MBB portfolio concentration is well-diversified, with the top 10 representing 14.0% of total assets. The largest sector exposure is Financials at 90.7%.

MBB sectors provide a detailed breakdown. MBB overlap shows how holdings compare to other funds in your portfolio.

Compare MBB

MBB vs SPYMBB vs QQQMBB vs VOOMBB vs VTIMBB vs IVVMBB vs SCHDMBB vs VYMMBB vs VXUS
Showing 10 of 11,186 holdingsTop 10 Weight: 13.99%
#TickerNameIndustryWeightAllocation
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%
Want to see all 11,186 holdings?

Holdings Distribution

Loading chart...