(Bloomberg) -- Hamza Lemssouguer, who made a name for himself as a top debt trader at Credit Suisse Group AG, has suffered losses at the hedge fund he started this year. The Arini Credit Master Fund slumped 16% this year through September, according to multiple people briefed on the results. The fund rebounded in October, trimming the year-to-date decline to about 9%, said a separate person with direct knowledge, asking not to be identified discussing figures that haven’t been disclosed. A representative for the London-based firm declined to comment.