With central banks – especially in advanced economies and the high-income emerging economies – wary of using policy rates to fight bubbles, most countries are relying on macro-prudential regulation and supervision of the financial system to address frothy housing markets. That means lower loan-to-value ratios, stricter mortgage-underwriting standards, limits on second-home financing, higher counter-cyclical capital buffers for mortgage lending, higher permanent capital charges for mortgages, and restrictions on the use of pension funds for down payments on home purchases.