As reported by The Wall Street Journal in November, he didn't rely heavily on the risk-management department at MF Global, reporting only to the company's board of directors.
"I thought the firm had a very good shot under Corzine, but clearly he went overboard, " said Mike Fitzpatrick, a 59-year-old former crude-oil trader at MF Global who left shortly after Mr. Corzine's arrival because he didn't want to take more risks.