Goldman Sachs is paying its largest bill yet to resolve a government lawsuit related to the financial crisis. The bank said ... that it had agreed to buy back $3.15 billion in mortgage bonds from Fannie Mae and Freddie Mac to end a lawsuit filed in 2011 by the Federal Housing Finance Agency, the federal regulator that oversees the two mortgage companies. The agency had accused Goldman of unloading low-quality mortgage bonds onto Fannie Mae and Freddie Mac in the run-up to the financial crisis. It estimates that Goldman is paying $1.2 billion more than the bonds are now worth. Most of the other 18 banks that faced similar suits from the housing agency have already reached settlements. The previous settlements have included penalties, which Goldman avoided. But Goldman had been hoping to avoid settling the suit altogether, contending as recently as last month that many of the government's claims should be dismissed. The $1.2 billion figure carries a sting because it is double the $550 million payment that Goldman made in 2010 to settle the most prominent crisis-era case it has faced - the so-called Abacus case. Since then, Goldman has largely avoided the billion-dollar penalties paid by other banks for wrongdoing before the 2008 crisis. This week, Bank of America reached a $16.65 billion settlement with the Justice Department related to the bank's handling of shoddy mortgages. In a separate deal this year, Bank of America agreed to pay $9.5 billion to settle its part of the housing finance agency's lawsuit. Some of that money was a penalty and the rest was used to buy back mortgage bonds.