Andrew Left, the founder of Citron Research whose bets against companies from electric car maker Tesla to drugmaker Valeant Pharmaceuticals made him one of Wall Street's most prominent short-sellers, is ready to put investors' money where his mouth is. After investing only his own wealth for roughly two decades, Left is speaking to potential investors about launching Citron Capital, his first-ever hedge fund, that will begin trading in weeks, he told Reuters in an interview. The move could give Left more firepower to go after some of the biggest U.S. companies.