Zurich and Tokyo Top UBS Global Real Estate Bubble Index as Miami's Risk Eases

Across the world's major financial hubs, the cost of owning a newly purchased 650-square-foot apartment now consumes more than 40 percent of a skilled professional's gross annual income. That affordability ceiling is stalling price growth globally, but in Zurich and Tokyo, property values have detached so severely from local wages that the two cities now stand alone in the highest risk category of the 2026 UBS Global Real Estate Bubble Index.[1][4]

Zurich claimed the top spot with an index score of 1.69, driven by a two-decade run where inflation-adjusted housing prices surged by 140 percent. Over that same 20-year span, local household incomes grew by just 30 percent, pushing the Swiss financial center's price-to-rent ratio to 46 years—the highest multiple among all 23 markets analyzed by the bank.[1][2][5]

Tokyo followed closely with a score of 1.54, keeping it firmly in the high-risk tier. The Japanese capital has seen inflation-adjusted housing prices climb 50 percent over the last seven years, including a 6 percent jump in the past year alone, as wealth concentration and prime real estate demand outpace broader economic growth.[1][3][4]

The reshuffling at the top marks a significant cooling for Miami, which led the bubble index in the previous two editions. The South Florida hub saw its score drop to 1.41, moving it down into the "elevated risk" category alongside Dubai, Geneva, and two new additions to the 2026 study: Seoul and Lisbon.[1][4][6]

Lisbon and Seoul both experienced the sharpest increases in market imbalances this year, with real house prices in both cities rising by roughly 10 percent. Lisbon's decade-long housing boom, fueled by foreign capital and selective immigration policies, has pushed prices up nearly 7 percent annually, making it one of Europe's least affordable markets before a recent stall in rental growth signaled shifting momentum.[1][4]

Broadly, the era of cheap debt that inflated global property values has ended, acting as a ceiling on further price appreciation. "Higher-for-longer financing costs are likely to cap house-price gains in the near term," noted Matthias Holzhey, lead author of the study at UBS. Across the 23 tracked cities, inflation-adjusted home prices rose by an average of just 0.5 percent year-over-year, down from 1.4 percent in mid-2025.[1][4]

That stagnation masks sharp regional divergences. While Southern European and Asian hubs saw gains, North American markets faced significant corrections. Vancouver and Toronto recorded real price declines of roughly 10 percent as elevated mortgage rates battered buyer demand and eroded affordability.[1][4]

Major European financial centers also saw moderate price drops as the market adjusted to the new interest rate environment. Frankfurt and Munich recorded declines of 3.2 percent and 3.7 percent, respectively, pushing them into the moderate-risk category alongside Amsterdam, Madrid, and Milan.[1][4]

For buyers looking for relative stability, several global capitals remain in the low-risk tier. Paris, London, New York, San Francisco, and São Paulo all posted scores below 0.5, indicating that property values in those cities remain reasonably aligned with their historical income and rental fundamentals.[1][4]

A high bubble risk score does not guarantee an imminent market crash, but rather indicates extreme vulnerability to macroeconomic shifts. As the report notes, markets identified as high risk in 2021 have subsequently seen average price declines of roughly 15 percent, suggesting that when interest rates or supply dynamics change, the most stretched cities have the furthest to fall.[1][4]