The Global Housing Bubble Is Biggest In These Cities

UBS Global Real Estate Bubble Index

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Bubble risk seems greatest in Toronto, where it has increased significantly in the last year. Stockholm, Munich, Vancouver, Sydney, London and Hong Kong all remain in risk territory, with Amsterdam joining this group after being overvalued last year. Valuations are stretched in Paris, San Francisco, Los Angeles, Zurich, Frankfurt, Tokyo and Geneva as well. In contrast, property markets in Boston, Singapore, New York and Milan seem fairly valued, while Chicago remains undervalued, just as it was last year.

Price bubbles are a regularly recurring phenomenon in property markets. The term “bubble” refers to a substantial and sustained mispricing of an asset, the existence of which cannot be proved unless it bursts. But recurring patterns of property market excesses are observable in the historical data. Typical signs include a decoupling of prices from local incomes and rents, and distortions of the real economy, such as excessive lending and construction activity. The UBS Global Real Estate Bubble Index gauges the risk of a property bubble on the basis of such patterns.

Falling mortgage rates over the last decade have made buying a home vastly more attractive, which increased average willingness to pay for home ownership. In European cities, for example, the annual usage costs for apartments (mortgage interest payments and amortization) are still below their 10-year average, despite real prices escalating 30% since 2007. In Canada and Australia, too, a large part of the negative impact of higher purchase prices on affordability was cushioned by low mortgage rates.

The intuition is that the national and global growth of high-wealth households creates continued excess demand for the best locations. So, as long as supply cannot increase rapidly, prices in the so-called “Superstar cities” are supposed to decouple from rents, incomes and the respective countrywide price level. The superstar narrative has received additional impetus in the last couple of years from a surge in international demand, especially from China, which has crowded out local buyers. An average price growth of almost 20% in the last three years has confirmed the expectations of even the most optimistic investors.

Index for the past three years

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Annual price-increase rates of 10% correspond to a doubling of house prices every seven years, which is not sustainable. Nevertheless, the fear of missing out on further appreciation predominates among home buyers. After all, the price increases appear rational, for three reasons.

First, financing conditions in many cities are now more attractive than ever before. Second, the global increase in wealthy households seemingly creates constant demand for the most attractive residential areas. Third, building activity cannot keep pace with this demand.

Expectations tend to be prone to exaggerations in boom phases. The optimistic projections of the trends outlined above create ever-greater price fantasies. However, should sentiment change or interest rates increase, a correction is practically inevitable. In the past, rising interest rates almost always triggered a crash in housing markets. In addition, the dependence of prices on international flows of capital represents an incalculable risk. Plus, once demand fell, even the low growth in supply would no longer provide an anchor.

Housing Prices

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US UBS Global Real Estate Bubble Index, 1981 - 2017

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