As expected, the regulator overseeing Fannie Mae and Freddie Mac today sued many of the country's biggest banks, claiming the government-owned entities were duped into buying tens of billions of dollars in mortgage securities that went south.

In a news release, the FHFA detailed the banks it is suing. And its filings also detail the amount of mortgage securities Fannie and/or Freddie purchased that these banks sold, underwritten or otherwise were involved in.

Ally...