A fund controlled by a unit of Jefferies Financial Group Inc. sunk nearly a quarter of its $3 billion trade finance portfolio into receivables tied to auto parts supplier First Brands Group Inc. Jefferies’ own investment in that fund along with some First Brands loans it bought brings its total exposure to the now-bankrupt firm to $161 million, the bank disclosed on Wednesday. Most Read from Bloomberg The exposure is mostly through Point Bonita Capital, a division of Jefferies’ Leucadia Asset Management ...