Treasury yields fell. Mortgage rates went up anyway.

If you are shopping for a mortgage, you have probably read that interest rates are coming down. That is true, and it has not reached you. Over the past month the interest rate the US government pays fell by about a fifth of a percentage point, and the average 30-year mortgage went up by nearly a third of one. The gap between the two is the widest in months, and this post is about why that gap exists and what it costs.

Now the part that should annoy you. Over the same stretch, the average 30-year mortgage went up — from 7.03% to 7.32%, after touching 7.40% in early October (Freddie Mac via FRED, Oct 22). Treasury yields fell 22 basis points; mortgage rates rose 29. The gap between the two blew out from 185 to 236 basis points, the widest since at least August.

If you have been waiting for “rates coming down” to reach your closing costs, it hasn’t.

Start here: the three numbers that set your mortgage

The 10-year Treasury yield is the interest rate the US government pays to borrow money for ten years. It is the closest thing finance has to a risk-free price of money, because the government is the borrower least likely to default. Almost every other interest rate in the economy is quoted as “that, plus something”.

A basis point is one hundredth of a percentage point. A move from 5.18% to 4.96% is 22 basis points. The jargon exists because the difference between 5.18% and 4.96% is worth tens of billions of dollars across the bond market, and “about a fifth of a percent” is too vague to trade on.

The spread is the “plus something”. Your mortgage rate is the 10-year Treasury yield plus a margin that compensates the lender for the risks of lending to you rather than to the government: that you might repay early and cut their interest short, that the loan may be hard to sell on to investors, and that rates may lurch while they are holding it. That margin is normally around two percentage points.

So there are two ways your mortgage rate can rise. The government’s borrowing cost can go up, or the lender’s margin can widen. This month the first fell and the second widened by more — which is the entire story, and the reason the headlines and your quoted rate disagree.

The two lines that stopped moving together

Mortgage rates track the 10-year Treasury, but lenders add a spread for the risk that you refinance early, that loans are hard to sell on, and that rate volatility makes the whole package harder to hedge. When that volatility rises, the spread widens — and it has, from a typical 195–205 basis points over the summer to 236 today.

So the 10-year’s 22 basis point decline was more than eaten by a 51 basis point widening in what lenders charge on top of it.

What that costs, on a $400,000 30-year loan:

• At 7.03% (Sept 24): $2,669 a month
• At 7.32% (Oct 22): $2,748 a month

A month of falling Treasury yields made that payment $78 more expensive — about $941 a year, or roughly $28,000 over the life of the loan. Against a year ago, when the same loan cost $2,468, you are paying $280 more a month for the same house.

The cost of money is not set in the Treasury market alone. It is set by everyone standing between that market and your loan.

Last month’s winners and losers swapped places

When the price of safe money changes, it does not move every share equally. Companies that borrow heavily or sell a steady dividend — utility companies, property, small firms — compete directly with bonds, so they suffer when bond yields rise and recover when yields fall. Fast-growing companies with cash in the bank behave the opposite way.

Last month we wrote that the bond market was quietly deciding, sector by sector, who could afford a 5% risk-free rate — crushing anything rate-sensitive while mega-cap tech ran. October handed that trade back almost exactly.

The mirror image is nearly perfect: tech gave back roughly what it gained, utilities gained roughly what they lost. Health care joined them, up 5.0%. Nvidia fell 6.3% to $210.96. The S&P 500 slipped 1.5% to 7,623.68 and now sits 2.5% below its high, while the Nasdaq is 6.0% below its.

Two things did not reverse. Small caps still can’t catch a bid — the Russell 2000 fell another 2.2% and is 9.5% below its August high, despite being the group that supposedly needs lower rates most. And Apple kept grinding higher, up 2.0% to $347.73, within a rounding error of a record. The mega-cap trade didn’t break; it narrowed.

This rally looks like a growth scare, not relief

It would be comfortable to read falling yields as the inflation fight being won. The data doesn’t support that.

September CPI came in at 3.72% year over year, up from 3.35% in August and 3.30% in July, with prices rising 0.65% in the single month (FRED CPIAUCSL). That is the hottest monthly print of the year and the wrong direction entirely, against a 2% target.

So why did yields fall? A bond yield has two parts: the inflation investors expect to lose to over the life of the loan, and the real return they demand on top of it. The market publishes both separately, so you can see which part moved.

Expected inflation over the next decade barely budged — from 2.33% to 2.34%. The real return demanded fell from 2.85% to 2.64%, a 21 basis point decline. Essentially the whole fall in yields came from the real part. This was not investors deciding inflation is beaten; it was investors accepting a lower real return to own government bonds.

That distinction matters because of what makes people accept less to hold the safest asset there is: usually, worry about everything else.

A real-rate rally with inflation accelerating usually means one thing: investors are marking down expected growth. The rest of the tape agrees. The VIX jumped 31% to 19.45. Money went into utilities and health care — the two sectors you buy when you want earnings that don’t care about the economy. The 2s10s curve didn’t move at all, holding at +0.31, so this was a parallel shift downward rather than any change in the Fed’s expected path. The effective fed funds rate is unchanged at 3.88%.

Gold, notably, provided no shelter: GLD fell 6.8% on the month and is now 26% below its 52-week high and 7.5% down for the year.

What to watch next

We do not forecast rates, and none of the below is a prediction. These are simply the published numbers that would settle the questions this post raises, and when they arrive.

The margin, back toward 200 basis points. It sat between 181 and 204 all summer and is 236 now. Narrowing would pass the Treasury rally through to borrowers; staying wide means mortgage rates can hold above 7% even if the 10-year keeps falling. This is the single number a buyer should track, and it is derivable each Thursday from the Freddie Mac survey against that day’s 10-year.

The next CPI print. September came in at 3.72% year over year, accelerating from 3.35%. One hot month is noise; two is a trend, and a trend would put the bond rally that just happened under immediate pressure.

The 2-year Treasury, currently 4.65%. It tracks what markets expect the Fed to do over the next couple of years more closely than the 10-year does. It fell 22 basis points this month, which is the clearest sign in this data that investors are starting to price rate cuts.

The effective fed funds rate, unchanged at 3.88%. The Fed has not moved. Everything described in this post happened in the market around a policy rate that stayed still.

What it means for your money

Don’t time a home purchase off Treasury headlines. The number that sets your payment is the mortgage rate, and the spread between the two is moving more than the yield itself right now. Watch the Freddie Mac weekly survey directly.

Cash is still paid well, but the window may be closing. Short rates near 3.9% with the 2-year at 4.65% means high-yield savings and T-bills remain real competition for stocks. But the 2-year falling 22 basis points is the market starting to price cuts. If you have been meaning to ladder CDs or lock a longer term, the best rates of this cycle may already be behind you — the shape of the curve answers that better than any forecast.

Last month’s lesson still applies, sign flipped. If you felt clever in September because your fund was tech-heavy, October cost you 6.6% in that same sleeve. Two consecutive months of violent, opposite-direction sector rotation is the argument for owning the whole market rather than the part that just worked.

Long bonds are finally paying — and are still down. TLT gained 2.5% since our last brief but remains 6.7% lower for the year and 11.6% below its 52-week high. New money locks in roughly 5.3% for 30 years against 2.34% expected inflation. That real yield is historically generous. It is also what you get paid for accepting that long bonds have lost money three years running.

Watch the inflation print, not the yield. If September’s 3.72% was the start of a trend rather than noise, the bond rally that just happened is on borrowed time, and the Fed’s 3.88% stops looking like a plateau.

Yields came down this month, and almost nothing an ordinary borrower touches got cheaper. “Rates are falling” describes the government’s borrowing costs. Whether it describes yours is a separate question, and this month the answer was no.

Data appendix

Everything cited above, with the date each figure belongs to. Every series is public: the FRED codes below pull the exact same numbers. Treasury and mortgage series carry Oct 22 observations; equities are the Oct 23 close.

Mortgage payment figures assume a $400,000 30-year fixed loan, principal and interest only. All market data pulled directly from FRED (Federal Reserve Bank of St. Louis) and Yahoo Finance on October 25, 2026; comparisons run against our September brief, whose closing prices were re-verified against the same sources. For where the market stands right now, the Radar re-scores a liquid universe on live options data.