Goldman Sachs has agreed to pay an undisclosed settlement amount to ACA Financial Guaranty Corp. to resolve allegations of fraud related to insurance on a collateralized debt obligation backed by subprime mortgages. Details of the Abacus CDO settlement were not disclosed, although ACA initially sought $120 million in damages. First filed in 2011, ACA’s lawsuit accused Goldman Sachs and hedge fund Paulson & Co. of fraudulently persuading it to guarantee payments on the CDO prior to the financial crisis. ACA alleged...