Nick Crawford has rejoined the market after a lengthy spell of gardening leave. Crawford, who left his role as global co-head of trading at Merrill Lynch in the summer of 2006, started a couple of weeks ago at UniCredit in New York. His current position is head of fixed income, currencies and commodities NY. When he starts as global head of trading in January, he will report to Dan O’Sullivan and Ben Welsh, the bank’s global co-head of FICC.