J.P. Morgan and Chase Co. is set to pay a substantial sum to endprobes into mortgage-backed securities. That price tag would be$13 billion in total, with $4 billion earmarked to settleclaims from the Federal Housing Finance Agency.

However, J.P. Morgan was not the only bank who got into lendingtrouble, and for Bank of America, the FHFA price tag could be evenhigher.

Also read: NCUA Won't Confirm JP Morgan Deal

According to The Financial Times, the U.S. housingregulator is seeking $6 billion from BofA to settle civil claimsthat the bank sold faulty mortgage bonds to finance companiesFannie Mae and Freddie Mac. Negotiations are ongoing, and the twosides may not be able to come to a deal.

The FHFA sued 18 different firms, including BofA, two years agofor their roles in the mortgage crisis of 2008. After Fannie Maeand Freddie Mac's failures as a result of faulty bonds and loans,Bloomberg says the two companies have received$187.5 billion in federal aid.

Bank of America has faced a litany of litigation as a result ofits role in the financial crisis this year. The bank settled directly with Fannie Mae in early 2013 for nearly $12billion, and BofA settled with financial services company MBIA in May 2013. The company also attempted to settle withinvestors concerning losses from the crisis, but the FDIC challenged the agreement, saying the BofA's $500 million pricetage was too low.

Many of BofA's problems stem from the 2008 purchase ofCountrywide Financial Corp. In ongoing litigation, governmentalleges that Countrywide and BofA defrauded Fannie Mae and FreddieMac through a program called the High Speed Swim Lane, also knownas Hustle. In Hustle, the government says, Countrywidesystematically removed quality controls and relied more heavily onautomated loans, resulting in a higher loan default rate. FormerCountrywide executive Rebecca Mairone first appeared in courton Oct. 15 to dispute these claims.