The head of US fixed-income sales at UBS in New York has resigned, in the latest of a number of high-profile departures from the Swiss bank's fixed-income, currencies and commodities division in the past month.

Jon Bass resigned from his position on Wednesday, according to Thomson Reuters, a week after it emerged his boss, Chris Ryan, UBS' global head of credit markets, and three other senior members of the FICC team fell victim to a radical restructuring of the division.