A well-known money manager is shutting down his firm after a year of disappointing results — the latest sign of turmoil in the $3 trillion hedge fund industry, the New York Times reported today. Eric Mindich was once a Wall Street wunderkind, becoming the youngest ever partner at Goldman Sachs more than 20 years ago. He launched Eton Park Capital Management in 2004, expanding it to manage as much as $14 billion. In a letter to investors yesterday, Mindich said a mix of challenging market conditions and Eton Park’s poor performance had led to the decision. The firm’s assets under management have fallen by half since 2011.