The Fed Raised Rates — So Why Didn’t Mortgage Rates Suddenly Jump 0.25%?

If you’re thinking about buying a home, yesterday’s Federal Reserve announcement probably caught your attention.

On September 16, the Federal Reserve raised its target federal funds rate by 0.25 percentage points, bringing the target range to 3.75%–4.00%.

It would be easy to assume that mortgage rates should immediately increase by another 0.25%.

That isn’t how mortgage rates work.

In fact, much of yesterday’s Fed rate increase had already been reflected in mortgage rates before the Federal Reserve made its announcement.

Mortgage Rates Look Ahead, Not Backward

One of the biggest misconceptions among home buyers and sellers is that the Federal Reserve directly sets mortgage rates.

It doesn’t.

The Fed controls a short-term interest rate known as the federal funds rate. Thirty-year fixed mortgage rates are much more closely connected to the bond market, including Treasury yields and mortgage-backed securities.

And financial markets don't wait until the Fed makes an announcement to react.

Investors are constantly analyzing inflation, employment reports, economic growth and statements from Federal Reserve officials to anticipate what the Fed is likely to do next.

By the time yesterday’s 0.25% increase was officially announced, the move was already widely expected and largely incorporated into bond prices and mortgage rates. Mortgage News Daily reported that the hike was almost completely priced into financial markets before the announcement.

Think of it this way:

Mortgage rates often react to what investors think the Federal Reserve is going to do—not simply to what the Fed did yesterday.

What Does “Priced In” Mean?

Suppose investors become increasingly convinced that the Federal Reserve will raise rates at its next meeting.

They don't necessarily wait for that meeting.

Bond investors begin buying and selling based on that expectation today. Those changes affect Treasury yields and mortgage-backed securities, which can then affect the mortgage rates lenders offer borrowers.

That means mortgage rates can rise weeks—or even months—before an actual Fed rate increase.

The reverse can happen as well. If economic data suddenly suggests inflation is falling and future Fed hikes are becoming less likely, mortgage rates could potentially decline even while the federal funds rate remains unchanged.

The Market Is Already Looking at the Fed's Next Moves

Yesterday's rate increase isn't the end of the story.

The Federal Reserve's newly released economic projections show that policymakers currently see the federal funds rate around 4.1% at the end of 2026. That's higher than the midpoint of today's new 3.75%–4.00% range and indicates that additional tightening is part of the current policy outlook.

The important point for home buyers is that the bond market knows this too.

Expectations for future Fed policy are already influencing today's bond yields and mortgage rates. But those expectations aren't permanently locked in. They can change quickly when new inflation, employment or economic data comes out.

Why Mortgage Rates Can Move Even When the Fed Does Exactly What Was Expected

Here's where things get interesting.

If everyone expects the Fed to raise rates 0.25%, and the Fed raises rates exactly 0.25%, mortgage rates don't necessarily have to rise afterward.

The expected increase may already be reflected in the market.

Instead, investors immediately turn their attention to what comes next.

What did Fed officials say about inflation? How strong do they believe the economy is? Are additional increases likely? Has their outlook changed?

That's why the language surrounding a Fed announcement can sometimes have a bigger impact on mortgage rates than the rate decision itself.

That appears to have happened following yesterday's meeting. Mortgage News Daily reported that bond markets initially showed little reaction to the expected hike itself, with a larger reaction occurring later as investors digested the Fed's comments and the possibility of additional tightening.

Where Are Mortgage Rates Now?

As of September 17, Freddie Mac reports that the average 30-year fixed mortgage rate is 6.95%, compared with 6.76% one week earlier.

But that increase shouldn't simply be interpreted as, “The Fed raised rates, so mortgage rates went up.”

Mortgage rates had already been responding to inflation concerns, Treasury yields, economic data and expectations surrounding Federal Reserve policy before yesterday's announcement.

What This Means for Chicago Home Buyers

For someone considering purchasing a home in Chicago, waiting for the next Federal Reserve meeting doesn't necessarily mean you'll know which direction mortgage rates will move afterward.

The market may have already anticipated the Fed's decision.

Instead, mortgage rates between now and the next Fed meeting will likely continue reacting to new economic information—particularly inflation data, employment reports, Treasury yields and changing expectations about future Fed policy.

That also means an upcoming Fed rate hike does not automatically mean mortgage rates will rise by the same amount.

If the market expects a 0.25% Fed increase, much of that expectation may already be reflected in today's mortgage rates.

And if future economic data changes those expectations, mortgage rates can move well before the Fed actually takes action.

The Bottom Line

When you hear that the Federal Reserve raised interest rates by 0.25%, don't assume mortgage rates will automatically increase another 0.25%.

Mortgage markets are forward-looking.

Yesterday's Fed increase was largely anticipated before it happened, and today's mortgage rates reflect not only what the Federal Reserve has already done, but also the bond market's evolving expectations about inflation, economic growth and where Fed policy may go next.

For Chicago home buyers, that distinction is important. Trying to perfectly time a home purchase around a Federal Reserve meeting can be difficult because the mortgage market is usually trying to anticipate the Fed before the Fed ever makes its announcement.

Instead, buyers should focus on the mortgage rate and monthly payment available to them today, while working with a knowledgeable local lender who can explain how changing market conditions affect their specific financing options.