Billionaire investor Ray Dalio recently admitted to learning invaluable lessons after a bad investment left him so short of funds that he had to borrow $4,000 from his father. Although Dalio suffered that big loss over 40 years ago, he said he still relies on that experience when he screens new investments. During a conversation with Carlyle Group (NYSE:CG) co-founder Dave Rubenstein on "The 92nd Street Y, New York" podcast, Dalio said the lessons he learned from that mistake helped him turn Bridgewater A ...