A new study from the University of Texas finds that money flowing in from overseas investors is pushing house prices up in ways that have nothing to do with how many homes are actually being built.

The research, published in June 2026, shows that when international investment firms and foreign buyers treat houses as financial assets — like stocks or bonds — they create demand without encouraging construction. Fewer homes sit empty. Prices climb. Local residents, especially first-time buyers and renters with lower incomes, find themselves shut out of neighborhoods that were affordable just a few years ago.

The pattern is straightforward. If an investor is buying a house hoping to resell it for profit rather than to live in it, that activity bids up the price of existing homes. But it does not send a signal to builders to construct new ones. The market tightens. Prices rise. A separate 2024 study in the Journal of Economic Geography reached the same conclusion: foreign investment reduces affordability and vacancy rates without prompting any increase in new building.

The Same Problem Appearing Across Multiple Countries

This is happening in more than one place. In Portugal, Reuters reported in 2023 that since 2015, overseas investors and short-term rental platforms have reshaped the housing market — with younger Portuguese residents increasingly unable to buy homes. Spain faces similar pressure: 2025 data showed American buyers paying the highest prices and buying more homes than other foreign investors in several major Spanish cities.

Researchers documented the same pressure in American housing markets that were already struggling with not enough homes available. Canada, Western Europe, and Southern Europe all show this pattern. That breadth suggests it is a structural problem — driven by how global investment works — rather than something unique to one region.

What Governments Are Trying

Different countries have experimented with different solutions. Canada's housing minister proposed a temporary ban on foreign home buyers in December 2021, alongside rules allowing cities to build more densely. The idea is that restricting who can buy from outside the country needs to work alongside building more homes — neither alone is enough.

An academic study looked at how developing nations could attract foreign investment in real estate while still keeping housing affordable for local residents. The study accepted that a trade-off exists: you cannot simply welcome all foreign money without accepting some costs.

The United States faces a separate complication. A new rule requires that most materials used in federally funded affordable housing projects come from American manufacturers. In March 2026, AP News reported that this requirement is slowing construction. The rule was designed to protect American manufacturing, but it is now making it harder to build the affordable homes that low-income residents need most.

Why This Research Matters

The Texas study, combined with the earlier Journal of Economic Geography research, adds something concrete to the housing debate. Most people talk about housing affordability as either a supply problem — build more houses and prices fall — or a demand problem — limit how much rent people can be charged. Foreign investment introduces a third factor: demand from outside the country that is not connected to local wages and is not affected by how many new homes get built locally.

The research does not claim that foreign investment is the main cause of housing problems everywhere, and policymakers should not assume it is the answer to understanding all housing shortages. Local zoning rules that prevent new construction, rising building costs, and the way investment firms buy up residential properties all remain major causes. But the evidence is now clear across multiple studies and countries that outside investment money reduces affordability without spurring new construction.

The practical takeaway is that simply allowing more housing to be built may not be enough in cities where large amounts of foreign money is flowing in. Cities do need to make it easier to build — that remains essential. But on its own, that may not be enough if new homes are immediately bought up by investors with no intention of living in them. The lasting solutions will likely need to combine permission to build with rules limiting who from outside the country can buy residential property.

That policy combination is already being debated in legislatures in multiple countries, which gives the Texas research immediate real-world relevance.