As speculation continues over the direction of mortgage rates, a new analysis from TransUnion (NYSE: TRU) offers localized insights into how even small adjustments could expand or contract the pool of potential homebuyers across different metropolitan areas.

The research report examines the effects of a 25 basis-point shift—either up or down—from a baseline rate of 6.5 percent on the number of “mortgage-ready renters,” defined as individuals who meet standard qualification criteria (including a credit score of at least 661 and no recent bankruptcies, foreclosures, or problematic credit lines) for purchasing a $300,000 home.

Nationally, TransUnion estimates that nearly 30 million renters currently fit this profile.

According to the modeling, a quarter-point rate reduction could increase the size of this buyer-eligible group by roughly 4.9 percent to 11.9 percent, depending on the assumed home price.

Conversely, a similar rate increase could reduce the pool by approximately 4.2 percent to 10.4 percent.

These national figures, however, mask substantial variation at the local level, where economic conditions, income distributions, and housing costs create markedly different sensitivities to rate changes.

The research report from TransUnion categorizes metropolitan statistical areas (MSAs) into four distinct groups based on their projected responses.

Markets expected to gain the most potential buyers from a rate cut while losing the fewest from a hike include smaller communities such as Muncie, Indiana, and Decatur, Illinois.

These areas stand to benefit disproportionately from improved affordability. In contrast, places like Springfield, Ohio, and Warner-Robins, Georgia, are projected to experience the largest drops in mortgage-ready renters if rates rise, with comparatively modest gains if rates fall.

A third group—markets highly responsive in both directions—includes Waterloo-Cedar Falls, Iowa, and Battle Creek, Michigan, where rate movements could produce above-average swings in buyer demand.

Finally, more resilient markets, such as San Francisco-Oakland-Fremont, California, and Honolulu, Hawaii, along with major metros including New York, Los Angeles, and Chicago, show below-average reactions to rate shifts.

These larger cities benefit from greater diversity in household incomes and home prices, which buffers the impact of interest rate changes on overall homebuying activity.

Importantly, the analysis cautions that even favorable rate movements may not fully unlock housing activity.

Persistent low inventory levels and broader economic uncertainty continue to limit supply, meaning increased buyer demand could face significant constraints.

In some cases, rising interest from mortgage-ready renters might encourage property managers to sell rental units rather than continue leasing them, potentially adding to available stock—but only if supply-side pressures ease.

For real estate professionals, the findings provide practical guidance for prioritizing outreach.

Markets poised for stronger growth in mortgage-ready renters may warrant focused prospecting, while tools that help identify rental property owners can support conversations about potential sales.

TransUnion emphasizes that localized data like this enables agents to anticipate shifts rather than react after the fact.

Overall, the research report underscores that mortgage rate changes do not affect all housing markets equally. Smaller or more affordability-sensitive regions could see sharper movements in buyer pools, while diverse major metros may remain steadier. The TransUnion update has concluded that with inventory challenges likely to persist, real estate stakeholders will need both rate-aware strategies and supply-focused approaches to navigate the evolving landscape effectively.