Transmission chain
Fed cuts → housing: the transmission chain, traced end-to-end
The Fed does not set mortgage rates. Fed cuts affect housing indirectly: fed funds guides the front end, which shapes expectations for the 10-year Treasury, which anchors the 30-year mortgage rate through a mortgage-Treasury spread. That spread is not constant - it widens with MBS supply, prepayment risk, and vol (MOVE index). So a Fed cut can leave mortgage rates unchanged if the 10-year rises or the spread widens. Historically, the cleanest transmission runs 10Y down → mortgage rates down (with lag) → affordability up → demand up → prices firm.
Why "Fed cuts help housing" isn't automatic
The most common macro mistake in housing is treating fed funds and mortgage rates as the same thing. They're not.
- Fed funds - overnight rate the Fed sets directly
- 10-year Treasury - driven by growth expectations, inflation expectations, term premium, foreign demand
- 30-year mortgage rate - 10-year Treasury + mortgage-Treasury spread
The spread compresses in normal environments (150–200bps) and widens dramatically in stress (300bps+ in 2023). When the Fed cuts but the 10-year rises (because growth expectations improve or the market prices Fed capitulation to inflation), mortgage rates can rise on a Fed cut day.
The transmission chain
Fed cuts → 2Y ↓ → 10Y ↓ (if growth/inflation cooperate) → Mortgage-Treasury spread stable → 30Y mortgage ↓ → Payment on median home ↓ → Applications ↑ → Sales ↑ → Prices firm
Each arrow can break. The 2019 cuts didn't reach housing much because supply was tight. The 2020 cuts hit housing hard because supply and demand aligned.
Sensitivities that matter
- 10Y level, not just direction - a 30bps cut with 10Y unchanged does very little
- MOVE index - high rate vol widens the mortgage spread, offsetting Fed easing
- Inventory - if inventory is at cycle lows, lower rates fuel prices more than sales
- Consumer confidence and payrolls - rates without jobs = weak transmission
Historical episodes
- 2019 mid-cycle cuts (75bps) - mortgage rates fell moderately; housing responded weakly (tight supply)
- 2020 emergency cuts + QE - mortgage rates hit record lows; housing boomed
- 2023 pause after hikes - mortgage rates hit 8% despite Fed on hold (spread + 10Y drove it)
- 2024 first cut - mortgage rates barely responded initially as 10Y rose on growth data
What to watch on a Fed cut
- 10Y yield reaction - the actual signal, not the fed funds move
- MOVE index - is rate vol coming down? spreads follow
- MBA Purchase Applications - leading indicator, weekly
- Homebuilder equity (ITB, XHB) - front-runs housing data
- Lock-in effect - existing owners with 3% mortgages don't sell at 6%; matters even when rates fall
| Stage | Series | Typical lag |
|---|---|---|
| 1. Fed cuts / signals cuts | FEDFUNDS, dot plot | T |
| 2. Front end reprices | 2Y Treasury yield | Same day |
| 3. 10Y Treasury moves | DGS10 | Days |
| 4. Mortgage-Treasury spread adjusts | Primary-secondary spread, MOVE index | Days – weeks |
| 5. 30Y mortgage rate moves | MORTGAGE30US | 1 – 2 weeks |
| 6. Affordability improves | NAR Affordability Index | Weeks |
| 7. Applications rise | MBA Purchase Index | 1 – 4 weeks |
| 8. Sales pick up | Existing home sales, new home sales | 1 – 3 months |
| 9. Prices firm | Case-Shiller, FHFA HPI | 3 – 12 months |
Frequently asked questions
Do Fed rate cuts lower mortgage rates directly?
No. The Fed sets fed funds. Mortgage rates track the 10-year Treasury yield plus a mortgage-Treasury spread. Fed cuts influence the 10-year through expectations, but the transmission is not 1:1 and can be zero or negative on any given day.
How long from a Fed cut to lower mortgage rates?
The 10-year moves within days if the cut confirms expectations. The 30-year mortgage rate follows within 1–2 weeks. But if the cut is fully priced in, mortgage rates may not move at all - bond markets already reflect the cut before it happens.
What determines the mortgage-Treasury spread?
MBS supply and demand, prepayment risk (higher when rates are volatile), Fed MBS balance sheet policy, and interest rate volatility (MOVE index). The spread was ~170bps historically, widened to 300bps+ in 2023, and compresses as vol falls.
Do Fed cuts always cause housing prices to rise?
No. Cuts help affordability, but housing supply, employment, and existing-home lock-in effects also matter. In 2019 cuts didn't reignite housing much. In 2020 cuts + tight supply drove a boom. In 2024 the lock-in effect muted the response despite cuts starting.