Jefferies is facing redemption requests from investors who had money in a hedge fund arm of the bank, Point Bonita Capital, which had a quarter of one of its portfolios — some $715 million — tied to First Brands. The situation is a particular threat to Jefferies’ reputation because the bank also helped First Brands sell a significant chunk of its long-term loans over the past decade.Raistone, the company that called for the investigation, and that had facilitated First Brands’ short-term borrowing, derived ...