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MBB - ETF Fact Sheet

iShares MBS ETF - USD

Fund Identification

Ticker

MBB

ISIN

US4642885887

Main Metrics

Price

$95.04

Expense Ratio

0.04%

AuM

$38,758.68M

Tracking Difference

-0.06%

Ratings

Trackinsight rating

ESG Consensus®

This fund’s exact Final Sustainability Grade is available in Trackinsight Enterprise.
Learn more about Trackinsight Enterprise

Official Investment Strategy

The iShares MBS ETF (MBB) seeks to track the investment results of an index composed of investment-grade mortgage-backed pass-through securities issued and/or guaranteed by U.S. government agencies.

MBB's historical prices, performance, and flows

-2.5-2.0-1.5-1.0-0.50.0%
1m returns
-1.62%
1m flows
-$285M
* Net total returns
All data as of 31 March 2026

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MBB's characteristics

Manager

Manager statistics

1728 funds, $5,607.32Bn in AUM

Benchmark

Bloomberg U.S. MBS Total Return Index - USD

Replication method

Direct (Physical)

Asset class

Fixed Income

Dividend policy

Distributing

Meets ESG criteria

No
MBB's exposure

Countries

USA
100.00%

Sectors

Other sectors
19.14%
Other
80.86%

Top 5 holdings

Other
84.47%
FR SD8146, 2% 1may2051, USD (ABS)
1.07%
G2 MA7648, 2% 20oct2051, USD (ABS)
0.56%
FN MA4492, 2% 1dec2051, USD (ABS)
0.53%
FR SD8140, 2% 1apr2051, USD (ABS)
0.51%
Total holdings
1,189
Total weight of top 5
87.14%
0.0%