The Fed may cut interest rates next week. Here's what happened to mortgage rates the last two times it did that.

Rising unemployment (highest since October 2021) and a reported loss of 32,000 private‑sector jobs in November have pushed the CME FedWatch probability of a December 10 Fed rate cut to just under 90%, following a resumed cut campaign that began in late 2024. Mortgage markets have shown a pattern where 30‑year rates fell to multi‑year lows immediately before recent 25bp cuts (e.g., 6.13% in September 2025) but did not decline cleanly after the announcements, suggesting lenders may preemptively offer lower rates ahead of the Fed decision; mortgage borrowers and investors should monitor early‑week windows to lock favorable terms.

Analysis

Market structure: A December Fed cut (>85% priced) is already being front‑run by lenders and markets; direct winners are agency MBS holders (price/risk‑adjusted yield improves), homebuilders (LEN, PHM, XHB) and mortgage REITs (NLY, AGNC) if 10y yields stay down 10–30bp. Losers are net interest margin (NIM) dependent banks (regional KRE constituents, WFC, JPM) and mortgage originators that rely on wide lock‑to‑close spreads; nonbank originators can steal share by lowering advertised rates.

Risk assessment: Tail risks include an inflation or payroll surprise that forces the Fed to pause and sends 10y >+50bp, which could reprice MBS down >5% in days due to convexity and hedging flows. Timing matters: immediate (days) will see preemptive lender rate windows and volatile MBS/10y moves; short term (weeks) NIM compression and originations pick up; medium/long (3–12 months) housing demand depends on job trend and inventory elasticity. Hidden risks: lender pre‑cuts, MBS repo/hedge squeezes and Fed balance‑sheet actions can amplify moves.

Trade implications: Tactical plays favor long agency MBS and duration (if 10y stays ≤4.0%) and long homebuilder exposure vs short regional banks to capture spread squeeze and NIM compression respectively. Use options to express direction with defined loss: near‑term call spreads on XHB or protective puts on mortgage REITs to hedge convexity. Entry: deploy within 48–72 hours before/after the Fed cut; reassess at 2–4 week marks based on 10y yield moves and mortgage‑to‑10y spread.

Contrarian angles: Consensus expects uniform mortgage rate falls post‑cut, but history shows rates often trough before cuts and then reprice; betting solely on a post‑cut drop is underdone risk. Mispricings: mortgage REITs may be overvalued if hedging costs spike — prefer MBB (agency MBS ETF) over levered REITs unless hedged. Unintended consequence: faster origination growth could tighten building materials and producer prices, re‑inflating yields.

Key Decisions for Investors

• Establish a 2–3% portfolio position long iShares MBS ETF (MBB) within 48 hours, target a 3–6% gain over 1–3 months; trim/exit if 10y yield rises >25bp from entry or MBB falls 4%.
• Implement a 2% pair trade: long XHB (homebuilder ETF) and short KRE (regional bank ETF) equal notional, horizon 3 months; take profits if XHB outperforms KRE by +8%, stop‑loss if either leg moves adverse by 8%.
• Buy a 6–8 week call spread on XHB (e.g., buy 1x month ATM, sell higher strike ~+7–10%) allocating 0.5–1% of portfolio to capture pre/post‑cut windows; close if premium decays >50% or XHB rallies >8%.
• Reduce regional bank exposure (KRE constituents) by ~25% within two weeks to hedge NIM compression risk; redeploy proceeds into MBB and selective homebuilders (LEN, PHM) if mortgage‑to‑10y spread tightens by ≥10bp.
• Avoid unhedged leveraged mortgage REITs (NLY/AGNC) for >1 month unless you purchase OTM 3‑month puts (1–2% allocation) to cap convexity risk; only re‑enter on clear 10y <4.0% and stable spread environment.