Mortgage Rates Explained: What Moves Them and What You Control

A mortgage rate quote reflects three things: the broader interest-rate environment, the borrower's personal credit profile, and the lender's pricing margin. Knowing which factors are which determines what is worth negotiating and what is fixed by the market.

The Rate Is Not Set by the Federal Reserve

A common confusion: when news coverage refers to “the Fed raising rates,” the reference is to the federal funds rate, which is the overnight rate banks charge each other. Mortgage rates track a different reference point, the yield on the 10-year Treasury, plus a spread for mortgage-backed securities (MBS).

The 10-year Treasury yield moves on inflation expectations, growth expectations, and global capital flows. The MBS spread reflects prepayment risk and demand for mortgage bonds. The Fed influences both indirectly, particularly when it buys or sells MBS as part of its balance-sheet operations, but it does not set mortgage rates the way it sets the federal funds rate.

The practical implication is that mortgage rates often move ahead of Fed announcements rather than after them, as Treasury markets price in expected decisions in advance.

What Determines Your Specific Rate

Advertised rates are typically quoted for an idealized borrower on an idealized loan. Actual rates are adjusted from that baseline by risk-based pricing factors known as loan-level price adjustments (LLPAs):

• Credit score. The largest controllable factor. A move from 680 to 760 can shift a quoted rate by 0.5 percent or more. Below 680, pricing penalties increase quickly.
• Loan-to-value ratio (LTV). Higher down payments lower the rate. The significant breakpoints are 80, 85, 90, and 95 percent LTV.
• Debt-to-income ratio (DTI). Primarily affects approval; high DTI can also draw a pricing adjustment in some cases.
• Property type. Single-family primary residences carry the lowest rates. Condos, 2- to 4-unit properties, second homes, and investment properties all price higher.
• Loan purpose. Purchase and rate-and-term refinances price similarly. Cash-out refinances price meaningfully higher.
• Loan size. Loans above the conforming limit (jumbo) historically carried a premium. In 2025, jumbo pricing for strong borrowers has often been at or below conforming.

Points, Credits, and the Pricing Grid

Every Loan Estimate is built from a pricing grid that trades rate against upfront cost:

• Discount points. Pay 1 percent of the loan upfront to lower the rate, typically by about 0.25 percent. The break-even period is usually five to seven years; only worth purchasing if the loan is expected to be held longer.
• Lender credits. The reverse. Accept a higher rate, and the lender covers part of the closing costs. Useful when cash at closing is constrained or when a refinance is likely soon.
• Par rate. The point on the grid where no points are paid and no credits are received. The default starting point for most borrowers.

Fixed vs. Adjustable

Adjustable-rate mortgages (ARMs) carry a fixed rate for an initial period, typically 5, 7, or 10 years, after which the rate adjusts periodically based on a published index (often SOFR) plus a margin. The initial rate is usually 0.5 to 1 percent below the comparable 30-year fixed.

Fixed is typically preferable when:

• The expected holding period is 10 years or longer.
• The current fixed rate is acceptable to lock in for that horizon.
• The household budget cannot absorb a future payment increase.

ARM is worth considering when:

• A move or refinance inside the fixed period is likely.
• The rate gap between ARM and fixed is wide (0.75 percent or more).
• Rates are at a multi-year peak with credible expectation of future declines, in which case a future adjustment may move down rather than up.

An ARM should not be used as a way to qualify for a payment that would not be affordable at the fixed-rate equivalent.

Rate Locks

A rate lock fixes the quoted rate for a defined period (typically 30, 45, or 60 days) while the loan is processed. Longer locks cost more. Three points worth knowing:

• Lender rate sheets change daily and sometimes intraday. Once locked, only material changes to credit, income, or property can trigger repricing.
• A float-down option, available from some lenders for a fee, allows capturing a lower rate if the market moves down meaningfully after lock.
• Trying to time market lows is generally unproductive. A 0.125 percent rate difference costs less over the life of a loan than a delayed closing that loses the house.

Shopping Rates Effectively

1. Collect three written Loan Estimates on the same day. Rates change daily; quotes from different days are not comparable.
2. Compare APR, not just the headline rate. APR includes origination fees, points, and most lender costs. Two loans at the same rate can have materially different APRs.
3. Include credit unions and smaller lenders in the comparison. Pricing varies meaningfully across institutions; the largest national lenders are not consistently the cheapest.

Historical Context

Freddie Mac has tracked the 30-year fixed rate since 1971. The long-run average is roughly 7.7 percent. The peak was above 18 percent in 1981. The sub-4 percent rates of 2020 to 2021 were a historical anomaly produced by extraordinary monetary policy during the COVID period, not a baseline to expect a return to.

The more useful question is not whether rates feel high relative to recent memory, but whether the payment works for the household at the available rate, with the option to refinance if rates fall later.