MBB ETF

MBB ETF
$91.11
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MBB holds 10.4% of its assets in its 10 largest positions as of Oct 16, 2026. MBB is iShares MBS ETF.

Showing the top 10 of 8,344 holdings · as of Oct 16, 2026
Top 10 weight
10.42%
MBB top 10 holdings, by weight
#TickerNameWeightCumulativeMkt valueSectorIndustry
1
BISXX
Blackrock Cash Funds: Institutional, Sl Agency SharesFinancials · Capital Markets
4.89%		4.9%$1.73BFinancialsCapital Markets
2—Fhlmc 30Yr Umbs Super 2% Apr 01, 2051Financials · Thrifts
1.04%		5.9%$369.10MFinancialsThrifts
Sector and industry · Pro
3—G2Sf 6 11/23
0.68%		6.6%$241.35M
4—Umbs, Tba
0.60%		7.2%$212.06M
5Debt-
0.59%		7.8%$207.53M
6DebtGovernment National Mortgage A
0.54%		8.3%$190.31M
7—Gnma2 30Yr 2% Dec 20, 2051
0.53%		8.9%$186.94M
8DebtFannie Mae Pool
0.52%		9.4%$184.79M
9DebtGinnie Mae Ii Pool
0.52%		9.9%$184.46M
10DebtGnma Ii P#Ma7472
0.51%		10.4%$181.49M
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Themes in the top 10
Asset ManagementETF ProvidersInvestment TechnologyLending & CreditMarket InfrastructureGlobal BankingInterest RatesInflation ProtectionInfrastructureSupply ChainDerivatives TradingHealth Insurance

MBB ETF Top Holdings

MBB holdings top 10 positions. The top 10 holdings account for 10.4% of the fund, led by Blackrock Cash Funds: Institutional, Sl Agency Shares at 4.9%, Fhlmc 30Yr Umbs Super 2% Apr 01, 2051 at 1.0%, G2Sf 6 11/23 at 0.7%.

MBB portfolio concentration is well-diversified, with the top 10 representing 10.4% of total assets. The largest sector exposure is Financials at 81.8%.

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 8,344 holdingsTop 10 Weight: 10.42%
#TickerNameIndustryWeightAllocation
1BISXXBlackrock Cash Funds: Institutional, Sl Agency SharesFinancials4.89%
2FR SD8146Fhlmc 30Yr Umbs Super 2% Apr 01, 2051Financials1.04%
3-G2Sf 6 11/23Other0.68%
4-Umbs, Tba Other0.60%
5G2 MB0025G2 Mb0025 5 11/20/54 2054-11-20Financials0.59%
6G2 MA7648Government National Mortgage A 2 10/20/2051Financials0.54%
7G2 MA7766Gnma2 30Yr 2% Dec 20, 2051Financials0.53%
8FN MA4492Fannie Mae Pool 2.0% 12/01/2051Financials0.52%
9-Ginnie Mae Ii Pool 5.5 11/01/2052Other0.52%
10G2 MA7472Gnma Ii P#Ma7472 2.5% 07/20/51Financials0.51%
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Holdings Distribution

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