There is increasing interest in loan to value (LTV) and debt service to income (DTI) limits as many countries face a new round of rising house prices. Yet, very little is known on how these regulatory  instruments work in practice. This paper contributes to fill this gap by looking closely at their use and effectiveness in six economies — Brazil, Hong Kong SAR, Korea, Malaysia, Poland, and Romania with longmatur . I n sights include rapid growth  or in the number of borrowers with multiple mortgages LTV loans signs of build up in systemic risk; monitoring nonperforming loans by loan characteristics can can be calibrating changes in the LTV and DTI limits ; as leakages are almost inevitable , help in  to address them at an early stage; and , in most cases, LTVs and DTIs tries were effective in reducing loan growth and improving debt always in curbing house price growth. Six years after the global financial crisis, a number of countries are facing a new round of surging house prices and increasing private sector leverage (IMF Global Housing Watch). To a great extent, this is the result of a prolonged period of very low interest rates aimed at fostering economic recovery in the advanced economies. In some countries—like China, Malaysia, and Turkey—the credit-to-GDP ratio grew more than five percentage points and real house prices by more than five percent in 2013. Risks related to rapid growth in consumer and real estate loans are well-known. There is ample empirical literature supporting the notion that financial crises typically have been preceded by periods of rapid credit growth, often accompanied by asset price bubbles.