\n(Bloomberg) On any given evening, after Mark Hart and his wife have put their kids to bed, he\u2019ll duck into his bedroom closet and close the door behind him. Then, by pixel-light, he goes to work. Hart, a hedge fund manager in Fort Worth, has a single fixation: the Chinese yuan. And at 9 p.m. Texas time, China\u2019s financial markets are in full-throated roar 13 time zones away.<\/p>\n
Surrounded by shirts and pants\u2014the closet is more convenient than his basement office\u2014Hart, 44, talks to Hong Kong, parsing the latest numbers and the scuttlebutt from Beijing and Shanghai. In the seven years since this all started, he might as well have learned Mandarin. (All three of his children speak the language now, unlike their old man.) Doggedness has cost him millions\u2014not to mention investors, employees, and, at times, damn near his sanity. But he won\u2019t, or maybe can\u2019t, let go now.<\/p>\n