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    30-Year Mortgage vs 10-Year Treasury

    The 30-year fixed mortgage rate closely tracks the 10-year Treasury yield plus a spread that reflects credit risk, prepayment risk, and mortgage-backed-security pricing.

    MORTGAGE30US
    30-Year Mortgage
    6.3 · Apr 2026
    vs
    DGS10
    10-Year Yield
    4.32 · Apr 2026
    Level
    Jul 14Jul 15Aug 16Aug 17Sep 18Oct 19Oct 20Nov 21Dec 22Jan 24Feb 25Apr 2602468
    • 30-Year Mortgage
    • 10-Year Yield

    Mortgages aren't priced directly off the Fed funds rate — they're priced off the 10-year Treasury yield plus a spread, usually 150–250 basis points wide. The spread absorbs three risks that Treasuries don't carry: credit risk (borrowers can default), prepayment risk (homeowners refinance when rates fall, cutting into lender returns), and the capital costs of funding mortgage-backed securities.

    The spread widens when MBS markets are stressed — it reached roughly 300 bps in 2022–23, well above its long-run average, as the Fed shrank its MBS holdings and volatility spiked. It narrows when those conditions reverse. Homebuyers watching mortgage rates often look at the 10-year yield because the spread tends to be mean-reverting: a 10-year move of 50 bps usually shows up in mortgage rates within a few weeks.

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