When the Federal Reserve raises or lowers interest rates, mortgage rates usually move in the same direction — but not always, and not by the same amount. The real driver of mortgage rates is the bond market, specifically the 10-year Treasury yield and the demand for mortgage-backed securities. Here is what actually moves your rate.
The Fed does not set mortgage rates
The Federal Reserve sets the federal funds rate — the overnight rate banks charge each other. That rate influences short-term borrowing (credit cards, auto loans, HELOCs) but it does not directly set 30-year mortgage rates. Mortgages are long-term loans, and their rates are set by the market for long-term bonds.
It is common to see the Fed raise rates by 0.25% and 30-year mortgage rates barely move — or even fall. This happened multiple times in 2022 and 2023. The bond market had already priced in the hike. Conversely, when the Fed paused in late 2023, mortgage rates fell because the market interpreted the pause as a signal that future inflation would ease.
The 10-year Treasury: the real anchor
The 30-year fixed mortgage rate tracks the yield on the 10-year Treasury note with remarkable consistency. The two move together because they are competing long-term investments. When the 10-year yield rises, mortgage rates rise; when it falls, mortgage rates fall.
The typical spread between the 30-year mortgage rate and the 10-year Treasury yield is 1.5 to 2.0 percentage points. So if the 10-year is at 4.0%, mortgage rates are typically around 5.5% to 6.0%. The spread is not constant — it widens in times of market stress and narrows when the mortgage market is calm and liquid.
| Period | 10-yr Treasury | 30-yr Mortgage | Spread |
|---|---|---|---|
| Jan 2021 | 1.1% | 2.7% | 1.6% |
| Oct 2022 | 4.1% | 7.1% | 3.0% |
| Jan 2024 | 4.0% | 6.6% | 2.6% |
| Aug 2026 (current) | 4.2% | 6.5% | 2.3% |
Notice the spread widened to 3.0% in late 2022 — a period of market stress and mortgage-market illiquidity. When the spread is wider than the historical norm, mortgage rates are higher than the Treasury would suggest; when it narrows back, mortgage rates fall even if the Treasury yield does not.
Mortgage-backed securities and investor demand
Most US mortgages are packaged into mortgage-backed securities (MBS) and sold to investors — primarily pension funds, insurance companies, and the Federal Reserve. The price investors are willing to pay for MBS sets the yield those MBS produce, and that yield is the effective cost of money for mortgage lenders.
When MBS demand is strong, lenders can offer lower mortgage rates. When MBS demand weakens (investors worry about prepayment risk, or the Fed is selling its MBS holdings), lenders have to raise rates to attract buyers. This is why mortgage rates sometimes move differently than the Treasury market — MBS demand can strengthen or weaken independently.
The Fed's MBS holdings matter. From 2020-2022 the Fed bought MBS aggressively to support the housing market, which helped hold mortgage rates near record lows. From 2022 onward the Fed let its MBS holdings run off (passive quantitative tightening), removing a major buyer from the market and contributing to higher mortgage rates.
Inflation expectations drive everything
The 10-year Treasury yield itself is driven by inflation expectations. Bond investors demand a yield that compensates them for expected inflation plus a real return. If inflation is expected to average 2.5% over the next decade and investors want a 1.5% real return, the 10-year yield settles around 4.0%. When inflation expectations rise, the 10-year yield rises, and mortgage rates follow.
This is why mortgage rates react to inflation data — CPI, PCE, wage growth — more than to Fed decisions. A hot inflation report can push mortgage rates up 0.25% in a single day because it changes the market's expectation for the next 10 years, not just the next Fed meeting.
Lender capacity and pipeline pressure
On top of the market factors, mortgage lenders have their own capacity constraints. When refinance volume is high (rates falling), lenders get backed up. To slow demand, they raise rates slightly above what the market would suggest — a "pipeline premium." When volume is low (rates high), lenders cut margins to win what little business there is, offering rates slightly below the market level.
This is why two lenders can quote different rates on the same day for the same borrower — they have different capacity, different hedging positions, and different margin targets. It is also why shopping your loan across 2-3 lenders is worth the effort.
What sets your individual rate
On top of the market rate, your individual mortgage rate is adjusted for risk based on:
- Credit score — higher score = lower rate. The gap between a 680 and a 760 can be 0.5% or more.
- Loan-to-value — bigger down payment = lower rate. Loans above 80% LTV carry pricing adjustments.
- Loan type — conventional, FHA, VA, and jumbo all price differently.
- Occupancy — primary residence gets the best rate; investment properties and second homes cost more.
- Term — 15-year loans typically price 0.25-0.5% below 30-year loans.
- Discount points — paying upfront lowers the rate permanently. See our points calculator.
- Temporary buydown — seller or builder can fund a 2-1 or 3-2-1 buydown to lower the rate for 1-3 years. See our buydown calculator.
When to lock your rate
Because mortgage rates move daily (sometimes intraday), the question of when to lock is real. Most lenders offer a 30-45 day lock for free; longer locks cost a fee. A lock protects you if rates rise before closing; it prevents you from benefiting if rates fall (unless your lock has a float-down option).
As a rule of thumb: lock when you are within 30 days of closing and you are comfortable with the rate you are being offered. Trying to time the market usually costs more than it saves, because the daily moves are unpredictable and the cost of a delayed close (rate-lock extension fees, risk of losing the rate entirely) can exceed any marginal savings.
If you expect rates to fall after you close, the answer is a refinance later, not a gamble on locking at the perfect moment.
Bottom line: Mortgage rates are set by the bond market, not the Fed. The 10-year Treasury yield is the anchor, MBS investor demand sets the spread, and inflation expectations drive the Treasury yield itself. Your individual rate is then adjusted for credit, LTV, loan type, and points/buydowns. Watch the 10-year yield and inflation data to anticipate where rates are headed, and lock when you are comfortable — do not try to time the bottom.