The ranks of foreign-exchange traders are rapidly thinning as a probe into alleged manipulation of benchmark rates widens and pressure mounts on the industry to reduce costs. More than 30 traders from 11 firms have been fired, suspended, taken leaves of absence or retired since October, when regulators said they were investigating the market, according to data compiled by Bloomberg. London-based Barclays Plc and Zurich-based UBS AG have been the worst-hit, each suspending at least half a dozen employees, the data show. “That’s a considerable percentage of the workforce,” said Brad Bechtel, managing director at Faros ... (full story)