A couple hunting for a three-bedroom in the Dallas suburbs this spring will scroll through roughly 30% more active listings than they would have found a year ago, according to metro-level tracking from Realtor.com. Phoenix looks similar. Nationally, the number of homes sitting on the market has climbed about 20% from the trough recorded in early 2025, a figure corroborated by brokerage reports from Redfin and Altos Research. On paper, that sounds like the relief buyers have been begging for since the pandemic scramble. In practice, prices have barely flinched, and the reason has everything to do with the mortgage rate stamped on millions of Americans’ existing loans.
Inventory is rising, yet prices keep grinding higher
The FHFA House Price Index released on March 31, 2026, showed U.S. home prices rose 1.6% year over year through January 2026. That is the slowest annual pace in several years, but it is still positive. Prices ticked up 0.1% from December to January on a seasonally adjusted basis. In a textbook housing cycle, a 20% jump in inventory paired with sluggish sales would push values down. That has not happened, and the math explains why.
As of mid-May 2026, the average 30-year fixed mortgage rate sat near 6.8%, according to Freddie Mac’s Primary Mortgage Market Survey. Meanwhile, roughly 60% of outstanding U.S. mortgages carry rates below 4%, and more than 80% sit below 6%, based on FHFA loan-level data through mid-2024 that has been analyzed by multiple researchers, including the authors of the NBER paper cited below. Consider a homeowner holding a 3% rate on a $400,000 balance. Their monthly principal and interest payment is about $1,686. If they sold and financed the same amount at 6.8%, that payment would jump to roughly $2,607, an increase of more than $900 a month. That penalty is enough to keep people rooted in place even when they want a bigger yard, a shorter commute, or a fresh start in a new city.
The lock-in effect is not just anecdotal
A National Bureau of Economic Research working paper studied how the rapid rate surge from 2022 to 2023 cratered homeowner mobility. The researchers found that the gap between a borrower’s existing rate and the prevailing market rate was one of the strongest predictors of whether that household would list its home. The wider the gap, the less likely the move. The paper’s data runs through 2023, but the underlying dynamic has only intensified: rates have stayed elevated for two additional years, and the gap for borrowers who locked in at 2.5% to 3.5% has not narrowed.
“People are not going to voluntarily give up a 3% mortgage in a 7% world,” said Daryl Fairweather, chief economist at Redfin, in a May 2026 media briefing. “The monthly payment shock is just too large.” That sentiment echoes what agents hear on the ground every day. Mark Fleming, chief economist at First American Financial, has described the dynamic as “golden handcuffs” that keep homeowners tethered to properties they might otherwise sell.
Some forced turnover is inevitable. Divorces, deaths, retirements, and cross-country job transfers push homes onto the market regardless of rate math. That slow churn of “must-move” households is a big part of why inventory has climbed at all. But it has not been enough to create the kind of supply wave that would meaningfully pressure prices downward.
Transaction volume tells the same story
Existing-home sales in 2024 fell to roughly 4.06 million, the lowest full-year total since 1995, according to National Association of Realtors data reported by the AP. Relative to the U.S. population, that level of activity had not been seen in nearly three decades. The picture did not improve much in 2025, with full-year sales hovering in the same depressed range. High prices and high rates squeezed buyers from one direction; the lock-in effect choked supply from the other. The result was a market frozen in place: few homes changing hands, and the ones that did still drawing multiple offers in desirable neighborhoods.
Early 2026 has not broken the pattern. NAR’s pending home sales index through the first quarter showed only a modest uptick from the prior year, not the kind of rebound that would signal a genuine thaw.
Builders are filling part of the gap
One shift worth noting: new-home sales have claimed a growing share of total transactions precisely because existing homeowners refuse to sell. The Census Bureau reported that newly built homes accounted for roughly 15% of all home sales in recent quarters, well above the historical norm of about 10% to 12%. National builders like D.R. Horton and Lennar have leaned into mortgage rate buydowns and incentives to attract buyers who cannot find what they need on the resale market. That has helped at the margins, but new construction alone cannot offset the millions of resale listings that the lock-in effect has pulled off the market.
The picture varies sharply by metro
Not every market looks the same, and the FHFA index makes that clear when broken out by census division. Parts of the South and Sun Belt, where builders ramped up construction during the pandemic, are now absorbing that new supply. In metros like Austin, San Antonio, and Jacksonville, active inventory has surged well above pre-pandemic norms, and price growth has stalled or turned slightly negative. Sellers in those markets are offering concessions, covering closing costs, and cutting list prices in ways that would have been unthinkable in 2022.
By contrast, land-constrained coastal metros with strict zoning, places like Boston, San Jose, and much of the New York suburbs, remain chronically undersupplied. Inventory there has ticked up from extreme lows but is still well below what would be needed to shift bargaining power toward buyers. Whether the national 20% inventory increase translates into real affordability relief depends almost entirely on where you are looking.
What could break the stalemate
A few scenarios could shift the balance, though none is guaranteed.
Rates drift toward 6% or below. Some locked-in owners might decide the penalty of moving is tolerable, especially those who bought at 3.5% or 4% rather than the rock-bottom rates of early 2021. But a rate decline would also pull sidelined buyers back into the market, reigniting competition and supporting prices from the demand side. History suggests that rate drops tend to boost demand faster than they unlock supply, which could keep prices firm or even push them higher.
Rates climb back toward 7.5% or higher. Affordability would deteriorate further, likely cooling demand. Yet the lock-in effect would also strengthen, pulling even more supply off the market. Prices could remain flat simply because neither side has enough leverage to move them.
Policy changes chip away at the structural shortage. Local zoning reforms that allow more housing density, or federal tax incentives designed to reduce the sting of giving up a low-rate mortgage, could help at the margins. Several states have passed or are considering accessory dwelling unit legislation and by-right development rules. But the timeline for new construction to meaningfully affect inventory is measured in years, not months.
First-time buyers absorb the worst of both forces
For families trying to buy a home in mid-2026, the takeaway is uncomfortable but clear. There are more options on the market than at any point since 2020, and that is good news for anyone who spent the past few years losing bidding wars. But “more options” has not translated into “lower prices.” A structural shortage built up over a decade of underbuilding, combined with the rate lock-in keeping existing homeowners in place, has created a floor under values that a 20% inventory bump alone cannot crack.
First-time buyers face a particularly frustrating version of this dynamic. They have no low-rate mortgage to protect, so they get none of the lock-in benefit, yet they absorb the full cost of today’s rates and the prices that lock-in has helped sustain.
The market is no longer the frenzied seller’s paradise of 2021 and 2022. It is something harder to categorize: a slow grind where listings accumulate, prices plateau, and the cost of borrowing keeps the math painful for almost everyone involved. Until rates fall enough to unlock both sellers and buyers at the same time, or until new construction catches up with demand, that grind is likely to continue.
David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
