A federal appeals court in New York this week will hear arguments from African-American subprime borrowers in Detroit in connection with a proposed class action challenging Morgan Stanley’s mortgage securitization practices during the subprime mortgage boom. The American Civil Liberties Union and its partners are seeking class-action status for the borrowers’ Fair Housing Act claims, which were initially rejected by a lower court. The court previously ruled that each borrower would have to sue on his or her own. The issue on appeal at the U.S. Court of Appeals for the Second Circuit is...