J effrey Gundlach is an American billionaire investor often referred to as the "Bond King" for his highly successful and influential career in fixed-income investing. He is the founder and CEO of DoubleLine Capital, a major investment management firm based in Los Angeles. Before starting his own firm, he had a long and hugely successful career at TCW Group, where he managed one of the top-performing bond funds in the country. His departure from TCW was famously acrimonious and led to a major legal battle.

In 2009, he founded DoubleLine, and a large number of his former team and clients followed him. He has since built the firm into a massive asset manager with hundreds of billions of dollars under management. He is known for his often bearish and contrarian macroeconomic views, which he shares in his closely followed webcasts. He is also a major art collector, with a world-class collection of modern and contemporary art, and is a prominent philanthropist.