iShares MBS ETFMBB

iSharesBonds & CashMortgage#482 of 785 by YTD

$91.53

−0.2% last session

−0.3% YTD

Data as of 11/3/20264:00 PM ET · End-of-day

Dividend-adjusted total return · Mar 16, 2007 – Nov 3, 2026MBB

Returns	1D	1M	3M	YTD	1Y	3Y	5Y	MAX
Total return	−0.2%	+3.1%	−0.8%	−0.3%	+0.4%	+19.8%	+1.1%	+64.4%
Peer average	−0.2%	+1.9%	−3.4%	−3.3%	−2.0%	+18.4%	−7.6%	—
S&P 500 · VOO	+0.3%	−2.6%	−1.7%	+11.5%	+11.9%	+90.9%	+77.5%	—

Key Statistics

Open all fund facts →

AUM: $35.7B
Expense ratio: 0.04%
Distribution yield: 4.5%
NAV: $91.59
Volume: 4.3M
Avg. volume 30D: 6.4M
High today: $91.77
Low today: $91.43
Previous close: $91.73
52-week high: $96.97
52-week low: $88.58
Our risk indicator: 2/5

MBB in One Breath

MBB Among Mortgage ETFs

YTD

#1MBSFRegan+3.1%$265M

#2MBSXRegan+2.7%$18.5M

#3EVMOEaton Vance+0.6%$804M

#4JMTGJ.P. Morgan−0.2%$6.8B

#5VMBSVanguard−0.2%$15.5B

#6MTGPWisdomTree−0.3%$72.8M

#7MBSDFlexShares−0.3%$88.8M

#8FSECFidelity−0.3%$4.5B

#10MBBiShares−0.3%$35.7B

End-of-day Nov 4, 2026 · 21 Mortgage ETFs by YTD

$10,000 in MBB

$10,000 in MBB became

$10,109

In the S&P 500 (VOO)

$17,749

Total return, dividends in · Oct 26, 2021 – Nov 3, 2026 · S&P 500 uses VOO

MBB’s Top Holdings

Today

BLACKROCK CASHBlackrock Cash Cl Inst Sl Agency5.3%FHLMC 30YR U1.1%UMBS 30YR TB0.9%GNMA2 30YR T0.7%FNMA 30YR UM0.7%GNMA2 30YR 50.6%GNMA2 30YR 20.5%GNMA2 30YR 20.5%FNMA 30YR UM0.5%GNMA2 30YR 20.5%FHLMC 30YR U0.5%GNMA2 30YR T0.5%FNMA 30YR UM0.4%GNMA2 30YR 50.4%GNMA2 30YR 50.4%GNMA2 30YR 50.4%UMBS 30YR TB0.4%GNMA2 30YR 20.4%GNMA2 30YR T0.3%FNMA 30YR UM0.3%GNMA2 30YR 20.3%GNMA2 30YR 50.3%

iShares MBB · 10,825 holdings · top 22 shown · tile size = share of the fund · as of Nov 3, 2026

What MBB Holds

Today

All holdings100.0%

BLACKROCK 5.3 · FHLMC 30YR 1.1 · UMBS 30YR · GNMA2 30YR · FNMA 30YR · GNMA2 30YR · GNMA2 30YR

iShares MBB · share of the fund · as of Nov 3, 2026

Blackrock’s Share of MBB

Today

5.3%

$53 of every $1,000 in MBB is Blackrock

Blackrock held by MBB

$1.9B

iShares MBB · each square = $10 of $1,000 · as of Nov 3, 2026

MBB’s Share of Mortgage ETFs

Today

40.2%

of the $88.9B in 25 Mortgage ETFs

MBB$35.7B40.2%

VMBS$15.5B17.4%

SPMB$7.0B7.9%

22 others$30.7B34.5%

Mortgage ETF AUM · Nov 4, 2026

MBB Fee per $100 vs Peers

Today

$0.04a year
per $100

$4 a year on $10,000

VMBS$0.03

SMBS$0.03

MBB$0.04

SPMB$0.04

JMBS$0.21

JMTG$0.37

Expense ratio · Mortgage peers · Nov 4, 2026

Inside MBB

10,825 holdings · as of Nov 3, 2026

MBB

iShares MBS ETF

Today

All holdings100.0%Blackrock 5.3%10,811 more holdings86.8% of the fund

All holdings100.0%10,819 more holdings90.8% of the fund

#	Ticker	Company	Weight ▼
1	—	Blackrock Cash CL Inst SL Agency	5.35%
2	—	Fhlmc 30yr Umbs Super 2.00% 05/01/2051	1.05%
3	—	Umbs 30yr Tba(reg A) 5.50% 11/12/2026	0.86%
4	—	Gnma2 30yr TBA 6.00% 11/19/2026	0.70%
5	—	Fnma 30yr Umbs 5.50% 09/01/2056	0.69%
6	—	Gnma2 30yr 5.00% 11/20/2054	0.59%
7	—	Gnma2 30yr 2.00% 10/20/2051	0.54%
8	—	Gnma2 30yr 2.00% 12/20/2051	0.53%
9	—	Fnma 30yr Umbs 2.00% 12/01/2051	0.53%
10	—	Gnma2 30yr 2.50% 07/20/2051	0.52%

iShares MBB · current holdings by weight · as of Nov 3, 2026 · each tile is one holding · top 20 = 15.4%

How It Compares

MBB

iShares MBS ETF’s Peers


MBB	iSharesThis fundRead Desk	0.04%	+0.4%	−0.3%	$35.7B
VMBS	VanguardRead Desk	0.03%	+0.7%	−0.2%	$15.5B
SPMB	SPDRRead Desk	0.04%	+0.2%	−0.5%	$7.0B
JMTG	J.P. MorganRead Desk	0.37%	+0.6%	−0.2%	$6.8B
SMBS	SchwabRead Desk	0.03%	+0.4%	−0.3%	$6.4B
JMBS	Janus HendersonRead Desk	0.21%	−0.1%	−1.0%	$6.4B

Mortgage peers · Past-year and ytd returns · as of Nov 4, 2026 · sorted by AUM

Head to Head

Put MBB head to head with VMBS →

VMBS vs MBB

YTD

VMBSVanguard · MortgageMBBiShares · Mortgage

Year to date

−0.2%

−0.3%

VMBS wins+0.1 pts

Past year

+0.7%

+0.4%

VMBS wins+0.3 pts

Fee

0.03%

0.04%

VMBS winslower fee

Yield

4.3%

4.5%

MBB wins+0.1 pts

AUM

$15.5B

$35.7B

MBB2.3× more

3–1VMBS wins

Vanguard VMBS and iShares MBB · year-to-date · as of Nov 4, 2026 · AUM not scored

MBB vs VOO

MBB · iShares MBS

+0.4%

VOO · S&P 500

+11.9%

Gap

11.5 pts

iShares MBB and Vanguard VOO · 1Y total return · as of Nov 4, 2026

MBB vs Its Peer Average

YTD

MBBAvsBPeer average

1D−0.2%−0.2%

1M+3.1%+1.9%

3M−0.8%−3.4%

YTD−0.3%−3.3%

1Y+0.4%−2.0%

3Y+19.8%+18.4%

5Y+1.1%−7.6%

6–1MBB wins

24 Mortgage peers · each row scaled to its leader

The Details

MBB

Risk

2/5our risk indicator

CalmerBumpier

Volatility · 1Y4.87%

Deepest drop · 1Y−5.4%

Lowest point · 5Y−15.6%

52-week range

$91.53

$88.58−5.6% from the high$96.97

iShares MBB · past-year price moves · as of Nov 4, 2026

MBB

Fund Facts

Today

2007launched Mar 13

Tracks[…]

Exchange · CUSIPNASDAQ · 464288588

StructureETF

Leverage1x

Cost on $10,000$4 a year

Go deeper

Prospectus & documents Trading & liquidity Fees & costs Distributions

iShares MBB · fund facts · as of Nov 4, 2026

MBB

Payouts by Year

$0.35per share, Nov 2026

Distribution yield4.5%

PaidEvery month

Latest ex-date · paidNov 2 · Nov 5, 2026

12 payouts added up$4.08 a share

iShares MBB · distributions by ex-date · 2021–2026

All Fund FactsDocuments · trading · fees · every payout

Prospectus & Documents

SEC reported portfolio · 2026-08-31 ↗SEC reported portfolio · 2026-05-31 ↗summary prospectus · SEC 497K ↗SEC reported portfolio · 2026-02-28 ↗SEC reported portfolio · 2025-11-30 ↗SEC reported portfolio · 2025-08-31 ↗

Trading & Liquidity

Net asset value$91.59

Premium / discount[…]

Median spread · 30D[…]

Volume today4.3M

Average volume · 30D6.4M

Shares outstanding[…]

Options[…]

Fees & Costs

Net expense ratio0.04%

Gross expense ratio[…]

Management fee[…]

Cost on $10,000 a year$4.00

Our risk indicator2/5

Estimated yearly cost excludes trading costs and assumes constant assets.

Distributions

Ex-date	Paid	Per share
Nov 2, 2026	Nov 5, 2026	$0.35
Oct 1, 2026	Oct 6, 2026	$0.37
Sep 1, 2026	Sep 4, 2026	$0.34
Aug 3, 2026	Aug 6, 2026	$0.34
Jul 1, 2026	Jul 7, 2026	$0.34
Jun 1, 2026	Jun 4, 2026	$0.33
May 1, 2026	May 6, 2026	$0.33
Apr 1, 2026	Apr 7, 2026	$0.33
Mar 2, 2026	Mar 5, 2026	$0.33
Feb 2, 2026	Feb 5, 2026	$0.33
Dec 19, 2025	Dec 24, 2025	$0.33
Dec 1, 2025	Dec 4, 2025	$0.35

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