Yields & Spreads

The 30-Year Fixed Mortgage Rate

The 30-year fixed mortgage is the dominant US home loan and the single most consequential consumer rate in the economy. It tracks the 10-year Treasury yield with a structural spread overlay, and when it moves, housing affordability, refinancing activity, household wealth, and homebuilder behavior all reset in lockstep. The 2021 sub-3% lows and the 2023 8% peak are book-end episodes in a generational reset of the housing market.

May 14, 2026MORTGAGE30USmortgages · housing · consumer-rates · fed-policy

MORTGAGE30Y

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The most consequential consumer interest rate in the US economy. The 30-year fixed mortgage is what governs housing affordability for first-time buyers, the cost of trading up for existing homeowners, the economics of refinancing decisions for everyone with a mortgage, and the demand calculus for the entire homebuilder industry. It moves with the 10-year Treasury yield but adds a spread that has its own dynamics — and that spread tells a story about the MBS market that's hidden in the headline rate.

MORTGAGE30Y

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What it measures

MORTGAGE30US is the weekly average commitment rate on conventional 30-year fixed-rate mortgages, published by Freddie Mac as part of its Primary Mortgage Market Survey (PMMS):

The data is collected weekly by surveying a panel of lenders — banks, thrifts, and credit unions — about the rates they're offering on new conforming 30-year fixed-rate mortgages with 0.7 points (loan-origination fees). FRED republishes the series as MORTGAGE30US. It's released every Thursday morning at 7:00 ET and reflects rates from earlier that week.

The "30-year fixed" specification is the dominant US mortgage product — roughly 70-80% of all conventional mortgages originated in the US have this structure. The rate is fixed for the life of the loan, even if market rates rise; the loan is amortized over 30 years; the borrower can prepay at any time without penalty. This last feature — the prepayment option — is the source of most of the spread complications in the MBS market.

Why it matters

Two angles.

The affordability-and-demand angle. Home affordability is approximately (income) ÷ (monthly mortgage payment). When the 30-year rate rises from 3% to 7%, the monthly payment on a $400,000 mortgage rises from $1,686 to $2,661 — nearly 60% more, with no change in the underlying home price. The affordability index produced by the National Association of Realtors collapsed to an all-time low in 2023, and home sales volume followed. New mortgage originations fell by approximately 60% from their 2021 peak to their 2023 trough. Homebuilders pivoted to providing rate buydowns (paying lenders to offer below-market rates) to keep new-home demand from collapsing entirely.

The household-wealth-and-mobility angle. US household wealth is concentrated in primary residences (typically 25-40% of total assets for the median household). When mortgage rates rise, home values stop appreciating (or fall), refinancing windows close, and household cash flows tighten. Worse, the lock-in effect freezes a generation of homeowners in their current homes — even when they'd prefer to move for a job, a family-size change, or retirement. Labor market mobility, urban-suburban migration, and household formation all slow. The 2022-2024 mortgage-rate regime is the most significant single contributor to recent US household behavior changes.

What moves it, and what it moves

Moves mortgage30y:

The 10-year Treasury yield. Roughly 1:1 over multi-month windows, with some short-term mortgage-spread noise on top.
MBS spread dynamics. The gap between MBS yields and Treasury yields, which expands during rate volatility (negative-convexity risk goes up), bank-failure episodes, and Fed-balance-sheet drawdowns (the Fed used to be a major MBS buyer; QT has removed that buyer).
Lender margins. During periods of weak origination volume, lenders fight for market share with thinner margins. During refi booms, lender capacity is constrained and margins expand.
Conforming loan limits. Periodic adjustments to the conforming loan limit by FHFA affect the mix of loans flowing into Fannie/Freddie versus private-label, which shifts the average market rate slightly.
Volatility expectations. Higher implied volatility in the MOVE index (the bond-market vol gauge) expands MBS spreads through the prepayment-option-pricing channel.

Mortgage30y moves:

New home purchase mortgage applications (a weekly indicator, lagged ~2 weeks behind rate moves).
Refinance applications (very sharp response — refi activity collapses or surges based on a single basis point threshold relative to the average outstanding rate).
Home prices (multi-quarter lag; higher rates reduce demand, but the lock-in effect can offset by reducing supply).
Homebuilder stocks and order books.
Bank deposit flows (high mortgage rates create demand for high-yielding savings, which competes with checking-account deposits).
The size of the typical US home being purchased (rate-sensitive borrowers buy down to smaller homes to fit the payment).

A worked example: the 2020-2023 round trip

The 30-year fixed mortgage rate began 2020 at 3.72%. The Fed's emergency rate cuts and massive MBS purchases through QE pushed rates down through 2020. By January 2021, the rate had reached an all-time low of 2.65% — the lowest in the survey's 50-year history. Refinancing volume hit records: the MBA refinance index averaged over 4,000 in 2020 and 2021, more than double its historical baseline.

The Fed began signaling tapering in late 2021, and as UST10Y started rising in early 2022, mortgage rates followed. By March 2022, the rate had crossed 4%. By May 2022, 5%. The Fed announced QT (balance sheet runoff) in mid-2022, removing the largest MBS buyer from the market — MBS spreads widened sharply.

The peak: 7.79% in late October 2023, the highest level since November 2000. Notably, UST10Y peaked at roughly 5.0% the same week — meaning the MBS spread was approximately 280 bps, near the historical high. From there, both Treasury yields and MBS spreads compressed, and the mortgage rate retreated to roughly 6.6% by year-end 2023 and then drifted in the 6-7% range through 2024.

The journey produced two records: the lowest mortgage rate ever recorded (2.65%) and one of the highest readings in modern history (7.79%), separated by less than three years. Housing affordability traveled a similar arc. Existing-home sales volume in 2023 was the lowest since 1995, despite the US having 50% more households now than then.

The current cycle, and the open question

Where does the 30-year mortgage settle?

5.5% (the "rate normalization" view) — UST10Y settles at ~4%, MBS spreads compress to a normal 150 bps as Fed QT stabilizes and rate volatility subsides. This unlocks meaningful refinancing activity for borrowers stuck at 6-7% from the 2022-2023 vintage. Roughly 30% of outstanding mortgages would have an economic incentive to refi.
6-7% (the "new steady state" view) — UST10Y stays at 4.5%, MBS spreads remain elevated at 200+ bps, rate volatility persists. Refi activity stays subdued; lock-in continues to suppress existing-home turnover. Housing affordability remains a structural headwind.
Volatility around the trend — even if the mean is settled, week-to-week mortgage rate volatility has been elevated since 2022, and individual Fed actions, Treasury auctions, and inflation prints continue producing 10-25 bp moves on news.

Watch points: the mortgage-Treasury spread itself (currently elevated; meaningful narrowing would imply meaningful rate relief without any UST10Y move); MBS sub-sector spreads (15s vs 30s, par vs current coupon); refinance index levels (a clean read on borrower behavior); and Treasury / Fed actions around the MBS portfolio (the Fed currently holds approximately $2 trillion of MBS via QE legacy positions; any change to the runoff pace materially affects spreads).

FAQ

Why does the 30-year mortgage track the 10-year Treasury and not the 30-year?

Because the average mortgage doesn't actually last 30 years — most are paid off within 7-10 years through refinancing, moving, or selling. Mortgage-backed securities (MBS), which is how the loans are funded, have an *effective* duration much shorter than 30 years for this reason. That effective duration is closer to UST10Y than to UST30Y. So the mortgage-MBS funding chain prices off the 10-year Treasury, plus a spread overlay that compensates investors for prepayment risk, credit risk, and option-like behavior of the borrower.

Why is the mortgage-Treasury spread so volatile?

Because of the embedded options. When a borrower has a 6% mortgage and rates drop to 4%, they have an option to refinance — at the borrower's discretion. MBS investors lose the high-coupon bond they thought they owned and get repaid at par. This 'negative convexity' means MBS underperform Treasuries when rates fall and outperform when rates rise — the mirror image of a normal bond. To compensate investors for this asymmetric risk, mortgages pay an extra spread over Treasuries that ranges from ~150 bps in calm markets to ~300 bps in volatile periods. The 2022-2023 vol regime widened this spread substantially — most of the increase in mortgage rates that year was spread widening, not Treasury moves.

How quickly does the mortgage rate respond to Fed policy?

It works through the 10-year Treasury yield, which itself responds to Fed policy with a complex lag. As a rule of thumb: a Fed rate change moves UST10Y within hours via expectations, and the mortgage rate adjusts within a few weeks through MBS repricing. But the *magnitude* of the response depends on how much of the Fed move was already priced in. If markets had been expecting a 75bp hike and the Fed delivers exactly 75bp, the mortgage rate may not move at all. If markets had been expecting 50bp and the Fed delivers 75bp, the mortgage rate moves up by something like 15-25 bps within a week.

What is the 'lock-in effect' and why does it matter?

Most US homeowners financed or refinanced at sub-4% rates in 2020-2021. When current mortgage rates are 6-7%, those homeowners would face a sharp increase in monthly payments if they moved and refinanced at current rates — even into a same-priced home. So they don't move. Existing-home listings collapse, inventory tightens, and the market becomes structurally illiquid. The result is that home prices can stay elevated despite weak underlying demand, because there's almost no supply willing to come to market. Estimates suggest 60-70% of outstanding US mortgages had rates below 5% as of mid-2024, and roughly 40% were below 4% — historic levels of lock-in.

When does refinancing volume surge?

When current mortgage rates fall meaningfully below borrowers' existing rates — historically, a 100bp gap is roughly the threshold where mass refinancing kicks in. The 2020-2021 period saw refi volumes hit all-time records (the Mortgage Bankers Association refinance index reached 4,800+ in early 2021) as borrowers with 4-5% mortgages refinanced to sub-3%. Conversely, the 2022-2024 period saw refi activity at multi-decade lows because almost no outstanding borrower had a higher rate than the current market. A meaningful refi wave next requires either current rates to fall back below ~5% or the housing turnover cycle to force enough borrowers into the market through life events (divorce, death, job relocation).