The majority of financial institutions defending themselves against a massive litigation initiative by the Federal Housing Finance Agency on behalf of Fannie Mae and Freddie Mac for toxic mortgage-backed securities purchased by the GSEs launched a counteroffensive this week by urging a federal appeals court to intervene in their favor against the “unfair” trial judge. Fifteen banks, including JPMorgan Chase, UBS Americas, Citigroup, Deutsche Bank and Bank of America, filed a joint petition with the Second Circuit Court of Appeals in New York complaining that U.S. District Judge Denise Cote has engaged in a “one-sided” approach designed to force a settlement rather than “foster fair and reasonable determination of the issues.”