The agency that oversees mortgage markets is preparing to file suit against more than a dozen big banks, accusing them of misrepresenting the quality of mortgages they packaged and sold during the housing bubble, The New York Times reported on Thursday.

The Federal Housing Finance Agency, which oversees mortgage giants Fannie Mae and Freddie Mac, is expected to file suit against Bank of America, JPMorgan Chase, Goldman Sachs and Deutsche Bank, among other banks, the Times reported, citing three unidentified individuals briefed on the matter.

The suits stem from subpoenas the finance agency issued to banks last year. They could be filed as early as Friday, the Times said, but if not filed Friday it said the suits would come on Tuesday.

The government will argue the banks, which pooled the mortgages and sold them as securities to investors, failed to perform due diligence required under securities law and missed evidence that borrowers' incomes were falsified or inflated, the Times reported....