Citigroup has hired Hans Peter Lorenzen, v.p. in European credit products strategy, from a similar role at BNP Paribas in London. He joined last month focusing on single-name credit-default swaps, to replace Roberto Fumagalli, who moved internally to structured credit sales. He reports to Matt King, head of European quantitative credit strategy and analysis. At BNP, he reported to Vivek Tawadey, head of credit strategy, who said he has not yet been replaced.