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🏁 COLD OPEN
Mortgage rates reached 6.95% last week, the day after the Fed raised rates for the first time since 2023. The same week, Realtor.com reported that builders were advertising new homes at an average rate of 3.92%.
Those two numbers are three points apart, and they don't measure the same thing. One is what a 30-year loan costs. The other is often what the first year costs.
Most new investors don't lose deals because they can't find listings. They lose because they can't tell which deals deserve their time. This week, that starts with reading a rate.
📊 MARKET PULSE
WEEK OF SEPTEMBER 22, 2026
Mortgage rates hit another 2026 high. The 30-year fixed averaged 6.95%, up from 6.76% the week before and 6.26% a year ago (Freddie Mac PMMS, September 17, 2026). The 7%-plus figures in some headlines come from daily rate trackers, a different measure.
The Fed raised rates. It lifted its benchmark a quarter point to 3.75%–4.00% on a 12–0 vote, its first increase since July 2023. Officials' median projection is 4.1% at the end of this year and again at the end of 2027: one more quarter-point increase, then no change (Federal Reserve, September 16, 2026).
Short-term borrowing cost more the next day. The prime rate rose to 7.00% from 6.75% on September 17 (Federal Reserve H.15, September 21, 2026). If your home equity line or rehab line is priced off prime, your rate rose with it.
Builders are paying to keep sales moving. 38% of builders cut prices in September, up from 35% in August, by an average of 6%. 66% used sales incentives, the highest share since December (NAHB, September 16, 2026).
Buyers stepped back. Pending sales fell 5.4% from a year earlier, to their lowest level in nearly three years (Redfin, four weeks ending September 13, 2026).
Prices are still rising. Home prices rose 3.7% from a year earlier in August, the fastest annual pace in a year (Redfin Home Price Index, September 22, 2026).
Tripwire check (the thresholds we told you we were watching):
Signal | Threshold promised | Where it stands |
|---|---|---|
30-year fixed | 6.25% to 6.75% through 2027 (set May 12) | 6.95%, the second straight print above the top, which is our rule for revisiting. The ceiling moved with the 10-year. We'll set the new range next Tuesday, in our quarterly review of this year's calls. |
10-year Treasury | Above 4.5% pushes mortgage rates to 6.75%+ | 4.96% (September 21). Played out. |
Fed | No cuts in 2026, possible hike (set June 30) | Raised September 16. |
Builders | The motivated seller (set July 21) | 38% cutting, 66% using incentives. Holding. |
What it signals: The Fed raised the cost of short-term money, the bond market had already pushed mortgage rates toward 7%, and buyers are pulling back. Builders can't wait out a slow market the way a homeowner can, because every unsold house costs them interest. So they are paying for sales, with price cuts and with rate promotions. That is the motivated seller we pointed to in July. It also means the most advertised number in new construction this fall is a promotional rate.
🎯 THIS WEEK'S MOVE
Price the Promotion at the Rate That Lasts
What's happening:
Builders are advertising an average rate of 3.92% on new homes, against 6.67% for the market in August, and 13.8% of new-construction listings offered a reduced rate (Realtor.com, September 15, 2026). With the 30-year now at 6.95%, the gap looks even wider.
Translation:
For many of these offers, 3.92% is the rate for year one, not for the loan. Realtor.com's own report says many are adjustable-rate loans or temporary buydowns, where the builder pays part of your interest for a year or two and the rate then steps up to the one written in your loan.
Two Fannie Mae rules matter here. Your lender has to qualify you at that full rate, not the promotional one. And temporary buydowns aren't allowed on a conventional loan for an investment property at all.
Your play this week:
✅ Ask three questions, in writing. Is this rate fixed for 30 years, or for the first year? What is the note rate? Do I have to live in the home, or use your lender, to get it?
✅ Run the deal at the note rate. That's the rate your lender uses, so use it too. If the deal only works below it, pass.
✅ If you'll live there, the promotion is real money. A house hack uses owner-occupant loan terms. Count the years the savings last, not the first payment.
✅ If it's a rental from day one, ask for the price instead. On a conventional investment loan, builder credits are capped at 2% of the price. A price reduction isn't capped, and it lowers your payment for all 30 years.
Why you care:
A rate that lasts a year is worth a year. The note rate is the one you live with.
🔬 DEAL LAB
Same House, Two Buyers
Setup: A new build lists at $450,000, the national median for new construction in August (Realtor.com). The builder advertises 3.92%. Two buyers each put 20% down, for a $360,000 loan.
Trap: Both compare 3.92% with today's 6.95% and see about $681 a month in savings.
Reality, buyer one: she'll live there. Say the offer is a 2-1 buydown on a 5.92% note: 3.92% in year one, 4.92% in year two, 5.92% from year three on. That's one common way to build a 3.92% ad.
Principal and interest | Monthly | vs. 6.95% |
|---|---|---|
Year 1 at 3.92% | $1,702 | $681 less |
Year 2 at 4.92% | $1,915 | $468 less |
Years 3 to 30 at 5.92% | $2,140 | $243 less |
No promotion, 6.95% | $2,383 |
Still a real discount: $243 a month for 28 years. But it's about a third of the ad, and $2,140 is the payment to plan around.
Reality, buyer two: it's a rental. The temporary buydown isn't available on her conventional investment loan, and builder credits are capped at 2%, or $9,000. The price isn't capped. Builders who are cutting are cutting 6% on average (NAHB). On this house that's $27,000: her loan drops to $338,400, her payment falls about $143 a month for all 30 years, and she puts $5,400 less down.
Fix: Price every promotion at the rate that lasts. Living there, plan on year three. Renting it out, ask for the price.
Illustrative example. Principal and interest only, 30-year loans, 20% down, compared with the September 17 PMMS average of 6.95%. Investment loans usually price above that average, so buyer two's savings are a floor. Buydown structures vary by builder; get the terms in writing.
📖 MICRO-GLOSSARY
Temporary buydown: A builder or seller pays part of your interest for the first year or two, so your rate starts low and steps up to the note rate. A 2-1 buydown starts two points below, then one point below, then the full rate.
Note rate: The rate written into your loan. It's what you pay once any promotion ends, and it's the rate a lender uses to qualify you.
Interested party contribution: Money a builder, seller or agent puts toward your loan or closing costs. On a conventional loan for a rental it's capped at 2% of the price. On a home you live in, the cap runs from 3% to 9%, depending on your down payment.
House hacking: Buying a home you live in and renting out part of it, so the rent covers part of the payment. Because you live there, you can use owner-occupant loan terms, which usually mean a lower rate and a smaller down payment.
💡 BOTTOM LINE
A builder's promotion can be real money. It's worth what it saves for as long as it lasts, and only to the buyer it's written for. Plan around the note rate, and if you're buying a rental, ask for the price.
Not every property is worth your time. The edge is knowing which ones are.
Your loan decides which of these promotions you can use, so it's worth sorting out before you tour a model home. Fund the Deal First walks through the loan lanes and how to line up a lender before you need one.
SOURCES
Realtor.com: Builder Incentives, Especially Reduced Rates, are a Bright Spot for Home Buyers: promotion share, average promotional rate, median new-construction price, released September 15, 2026
Fannie Mae Selling Guide B2-1.4-04, Temporary Interest Rate Buydowns and B3-4.1-02, Interested Party Contributions: eligibility, qualifying rate, contribution caps, Guide published September 2, 2026
Freddie Mac PMMS: 30-year fixed rate, September 17, 2026
Federal Reserve FOMC statement and economic projections, September 16, 2026; H.15 Selected Interest Rates: prime rate, released September 21, 2026
NAHB/Wells Fargo Housing Market Index: builder price cuts and incentives, September 16, 2026
Redfin housing market update: pending sales, four weeks ending September 13, published September 17, 2026; Redfin Home Price Index, September 22, 2026
U.S. Treasury daily par yield curve: 10-year yield, September 21, 2026
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COMPLIANCE
Educational only. Not financial, legal, or tax advice. Loan terms, rehab costs, and market conditions vary by lender, property, and location. Verify all assumptions with qualified professionals before investing.
Until next time,
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