Housing played a major role in the Global Crisis, and some worry that the ultra-low interest rate environment is inflating new housing bubbles. Using 140 years of data from 14 advanced economies, this column provides a quantitative measure of the financial stability risks that stem from extended periods of ultra-low interest rates. The historical insights suggest that the potentially destabilising by-products of easy money must be taken seriously and weighed carefully against the stimulus benefits. Macroeconomic stabilisation policy has implications for financial stability, and vice versa. Resolving this dichotomy requires central banks greater use of macroprudential tools.