The Real Math of Housing · Part 2 of 7 · A Texas United Mortgage Educational Series
This is one of the biggest misunderstandings in housing.
People often assume:
Mortgage rates go up.
Buyers disappear.
Home prices fall.
It sounds logical.
But there is another side of the transaction.
The seller.
Imagine someone bought or refinanced their home several years ago and has a 3% mortgage.
Now they are thinking about moving.
For illustration, suppose their next mortgage would carry a 7% rate. These are hypothetical rates, not current quotes.
Even if they can afford the new house, their monthly payment could increase dramatically.
So what do they do?
They stay.
They have a roof.
They have a job.
They have an affordable mortgage.
There may be very little financial reason to move.
Now we have fewer buyers because financing is expensive.
But we also have fewer sellers because homeowners do not want to give up their existing mortgages.
That means higher rates can reduce transaction volume without producing an equally large decline in home values.
Housing can effectively freeze.
In some markets, you can end up with:
High mortgage rates.
Low inventory.
Low sales volume.
Relatively high home prices.
Rents that remain elevated, depending on local rental supply and demand.
And fewer opportunities for families who require financing.
That is very different from a traditional housing crash.
The market does not necessarily collapse.
It simply stops moving.
For Realtors, mortgage companies, title companies, contractors and countless businesses tied to housing, that can be extremely painful even when home prices remain relatively stable.
This is not a guarantee that prices will hold. New construction, job losses, population changes, and the number of homes for sale can outweigh the lock-in effect. Houston, The Woodlands, and individual neighborhoods can behave differently.
FHFA research on mortgage rate lock-in supports the basic mechanism: a low existing mortgage rate can discourage a homeowner from selling. It does not provide a price forecast for your property.
Rates as of Thursday, October 15, 2026, 6:30 a.m. CT. These figures are a snapshot from the date and time above and will not update. For current pricing, see today’s Texas mortgage rates.
As in Part 1, we compare against the Optimal Blue Mortgage Market Indices, published daily by the Federal Reserve Bank of St. Louis. They report separate averages for conventional, FHA, and VA loans, based on actual rate locks covering more than a third of U.S. mortgage transactions. The most recent reading available this morning is for October 13.
| Loan type | Texas United Mortgage (Oct. 15, 2026) | National average interest rate (Optimal Blue, Oct. 13, 2026) | Our rate vs. national average |
|---|---|---|---|
| Conventional 30-year fixed | 6.875% (6.995% APR) | 7.36% | 0.49 lower |
| Conventional 15-year fixed | 6.125% (6.297% APR) | 6.72% | 0.60 lower |
| FHA 30-year fixed | 6.500% (7.344% APR) | 7.18% | 0.68 lower |
| VA 30-year fixed | 6.499% (6.614% APR) | 7.11% | 0.61 lower |
Compare interest rate to interest rate. The national averages are interest rates only; APRs are not published for these indices. APR includes costs such as fees and, for FHA loans, mortgage insurance, so an APR will typically be higher than the interest rate on the same loan.
The two numbers are not measured the same way. The national figures are averages of rates locked by borrowers across the country, while our rates are a same-day quote based on specific rate assumptions. Your rate will depend on your credit, down payment, loan amount, property type, and the day you lock.
| Loan type | Texas United: previous quote (Oct. 13) → today (Oct. 15) | National daily index (MND): Oct. 13 → Oct. 14 | National locks (Optimal Blue): Oct. 9 → Oct. 13 |
|---|---|---|---|
| Conventional 30-year fixed | 6.875% → 6.875% (unchanged) | 7.46% → 7.45% (down 0.01) | 7.39% → 7.36% (down 0.03) |
| Conventional 15-year fixed | 6.125% → 6.125% (unchanged) | 7.14% → 7.14% (unchanged) | 6.59% → 6.72% (up 0.13) |
| FHA 30-year fixed | 6.500% → 6.500% (unchanged) | 7.13% → 7.13% (unchanged) | 7.18% → 7.18% (unchanged) |
| VA 30-year fixed | 6.500% → 6.499% (essentially unchanged) | 7.15% → 7.15% (unchanged) | 7.13% → 7.11% (down 0.02) |
Optimal Blue did not publish a reading for October 12, so its previous reporting day is October 9. Mortgage News Daily (MND) tracks top-tier daily rate-sheet pricing and reads somewhat higher than lock-based averages; use it for direction, not as a quote.
Day over day, rates were essentially flat. The national 30-year daily index slipped one hundredth of a point, and our posted rates held where they were on October 13.
The bigger story is the last few weeks. The MND 30-year index climbed from 7.17% on September 22 to 7.61% on October 5, nearly half a percentage point in about two weeks, as the bond market reset its expectations for inflation and Federal Reserve policy. Since then, rates have given some of it back: the index posted its biggest one-day drop in three months on October 8 and eased to 7.45% by October 14. A hotter-than-expected consumer inflation (CPI) report on October 14 helped put a floor under that improvement, at least for now. Freddie Mac’s weekly survey showed the 30-year averaging 7.40% for the week of October 8, up from 7.28% a week earlier and 6.30% a year ago.
Here is why that matters for the lock-in story. A homeowner with a 3% mortgage is still looking at a gap of four percentage points or more. A few hundredths of a point in either direction will not convince that homeowner to sell. Day-to-day movement can matter a great deal to a buyer deciding when to lock, but it rarely changes resale inventory on its own.
Sources: Optimal Blue Mortgage Market Indices, retrieved from FRED, Federal Reserve Bank of St. Louis, October 15, 2026 (30-year conforming, 15-year conforming, 30-year FHA, 30-year VA); Mortgage News Daily Rate Index; Freddie Mac Primary Mortgage Market Survey; Texas United Mortgage: today’s mortgage rates in Texas.
A resale home in The Woodlands, a new home in a nearby development, and a home closer to your Houston workplace can face different competition. Compare recent sales and active listings for similar homes in the same area and price range. A metro-wide average is a starting point, not a valuation for your address.
For new construction, ask whether the builder is offering closing-cost assistance or a rate buydown, and compare the full terms with a resale purchase. Incentives vary; do not assume they are available. If a buydown is temporary, compare the payment after it ends as well as the initial payment.
Ask your agent to examine days on market, price reductions, and nearby competing inventory. Those details help determine your negotiating position more directly than a prediction about all of Texas.
Ask Texas United Mortgage to compare your existing housing costs with the full cost of your next home before you decide to move or wait.
At Texas United Mortgage, we help borrowers in Houston, The Woodlands, and surrounding Texas communities look beyond a rate quote. Our objective is to explain the numbers and help you make an informed real estate decision—even when the answer is to wait.
Get your personalized rate quote →
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