Paul Tudor Jones, a billionaire hedge fund manager well-known for shorting an overheated stock market ahead of its historic collapse on Black Monday in 1987 to earn an estimated $100 million, is signaling alarm bells along with opportunity calls once again. Jones is also the founder of the Robin Hood Foundation, a philanthropy organization founded in 1988 to reduce poverty. Credited with one of the greatest trades in financial history, he recently stated on CNBC that markets resemble the 1999 dot-com mel ...