A Manhattan district court judge last week dismissed lawsuits brought by the Federal Deposit Insurance Corp. against three large banks, saying the agency no longer has standing to sue after it sold the defective mortgages through a re-securitization transaction. Judge Andrew Carter of the U.S. District Court for the Southern District of New York threw out the government’s suits against Citigroup, Bank of New York Mellon and U.S. Bancorp, which accused the banks of failing as trustees to ensure the quality of $2.7 billion in MBS purchased by the failed Texas-based Guaranty Bank. Reuters was the first to report Carter’s decision. Guaranty went...