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Who in Congress Has Traded iShares MBS ETF (MBB)?

The iShares MBS ETF line shows up 16 times in the congressional disclosure record between 2018 and 2026, filed by 2 members: 11 purchases against 5 sales. On balance the chamber has been net buyers, and the purchases sit down 0.8% against the latest close.

16Trades
11Buys
5Sells
2Members
$93.17Latest close 2026-08-28
-0.8%Congress buys vs latest close*

*Purchases only, weighted by the midpoint of each disclosed dollar band and marked to the latest close. Filings report a range, never a share count, so this follows the stock rather than anyone's position size.

69% buys31% sells

How it splits by party

Republicans
11 buys · 5 sells
2 members · 16 trades
DateMemberTypeAmountEst. priceLatest closeReturn
2026-05-27John BoozmanBUY$1K–$15K$94.38$93.17 2026-08-28-1.3%
2026-05-13John BoozmanSELL$1K–$15K$94.35$93.17 2026-08-28+0.7% rt
2026-05-13John BoozmanSELL$1K–$15K$94.35$93.17 2026-08-28-1.2% rt
2026-02-06John BoozmanSELL$1K–$15K$95.53$93.17 2026-08-28-0.4% rt
2026-01-23John BoozmanBUY$1K–$15K$95.55$93.17 2026-08-28-2.5%
2025-11-21John BoozmanBUY$1K–$15K$95.49$93.17 2026-08-28-2.4%
2025-09-16John BoozmanSELL$1K–$15K$95.69$93.17 2026-08-28+7.6% rt
2025-08-01John BoozmanBUY$1K–$15K$93.72$93.17 2026-08-28-0.6%
2024-09-06John BoozmanBUY$1K–$15K$95.91$93.17 2026-08-28-2.9%
2023-11-07John BoozmanBUY$1K–$15K$88.93$93.17 2026-08-28+4.8%
2023-06-23JOHN BOOZMANBUY$1K–$15K$93.64$93.17 2026-08-28-0.5%
2023-06-13JOHN BOOZMANBUY$15K–$50K$93.13$93.17 2026-08-28+0.0%
2021-07-22Charles J. "Chuck" FleischmannBUY$1K–$15K$108.53$93.17 2026-08-28-14.2%
2021-02-01Charles J. "Chuck" FleischmannBUY$1K–$15K$110.13$93.17 2026-08-28-15.4%
2021-01-21Charles J. "Chuck" FleischmannBUY$1K–$15K$110.19$93.17 2026-08-28-15.4%
2018-12-21JOHN BOOZMANSELL$1K–$15K$104.08$93.17 2026-08-28+10.5% exit

Buys are marked to the latest close and treated as open. A sell tagged rt closes an earlier disclosed buy in the same name. exit shows how the stock moved after the member sold.

Frequently asked — iShares MBS ETF (MBB) congressional trades

Which lawmakers have traded iShares MBS ETF (MBB)?

2 members of the U.S. House and Senate have disclosed iShares MBS ETF transactions under the STOCK Act — 11 purchases and 5 sales. The full member-by-member breakdown, with dates and dollar ranges, is in the table above.

Which lawmakers bought MBB recently?

No member of Congress has disclosed a MBB purchase in the last 90 days. STOCK Act filings lag the trade by up to 45 days, so newer buys may still be pending disclosure.

How have Congress's MBB trades performed?

Notional-weighted, lawmakers' disclosed MBB buys are down 0.8% versus the latest close of $93.17. Each trade's own return — and realized round-trips on matched sells — is in the Return column.

Is it legal for members of Congress to trade iShares MBS ETF?

Yes. Under the 2012 STOCK Act, members of Congress may buy and sell individual stocks but must publicly disclose each transaction within 45 days. Bargo surfaces those filings so you can see who traded MBB and how it performed.

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