Corporate debt in emerging markets quadrupled between 2004-2014, rising to over $18 trillion. The composition of debt has shifted from loans to bonds. While greater leverage can boost growth, rapidly rising debt raises financial stability concerns. This chapter examines the factors driving emerging market leverage growth over the past decade using large databases. It finds that global factors like accommodative monetary policy in advanced economies have played a larger role than country or firm specific factors. Leverage has increased most in cyclical sectors like construction and has been associated with rising foreign currency exposure. Despite weaker balance sheets, emerging market firms have issued bonds at better terms by taking advantage of favorable global conditions. Policy recommendations include monitoring vulnerable firms and sectors closely, improving corporate debt