#mortgage-backed-securities

#mortgage-backed-securities

When bond investors chase yield, they often overlook the engine that drives total returns: price appreciation from interest rate movements. The iShares MBS ETF (NYSEARCA:MBB) demonstrates this dynamic perfectly. While its 4% yield attracts income seekers, the fund has benefited from mortgage-backed securities price movements in recent periods. What MBB Actually Does MBB provides exposure to agency mortgage-backed securities, the bonds backed by Fannie Mae, Freddie Mac, and Ginnie Mae. These aren't the risky subprime mortgages from 2008. They carry implicit or explicit government guarantees, eliminating credit risk. What remains is interest rate sensitivity and prepayment risk.

Jobs Friday came and went without much reaction in bond yields because the labor market isn't breaking, nor is it getting stronger. Mortgage rates dropped into the 5s for a short time on Friday as a result of Trump's earlier announcement directing the GSEs to buy $200 billion in mortgage backed securities. The 10-year yield didn't move much after the report.

Combined holdings at Fannie Mae and Freddie Mac grew at a 77% annualized pace over the six months ending in November 2025, rising by more than $68 billion to approximately $247 billion. There remains room for further expansion. Under the Preferred Stock Purchase Agreement (PSPA), each GSE's retained portfolio is capped at $250 billion, with an additional $225 billion limit imposed by the Federal Housing Finance Agency (FHFA) under a prior director.

He stressed that the U.S. mortgage-backed securities market relies on long-term, fixed-rate loans with highly predictable performance, something portability threatens to destabilize. Portable mortgages, in addition to other issues, would totally destroy the pricing models current used by MBS's in their investor presentations, Cantrell said. The portable mortgage is also predicated on widespread lender adoption and the lender being willing to trade one asset for another.

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