The official watchdog of the Federal Housing Finance Agency has pointedly suggested that the GSE regulator direct Fannie Mae and Freddie Mac to determine whether or by how much the two companies were swindled out of billions of dollars as a result of banks’ alleged manipulation of a key interest rate and then determine how to recoup those losses, in court if necessary. A recent unpublished memo by the FHFA’s Office of Inspector General urged the Finance Agency to prepare to file suit against the banks involved in setting the London Interbank Offered Rate after an analysis of the GSEs’ published financial statements and publicly available historical interest data concluded that Fannie and Freddie may have suffered more than $3 billion in losses due to LIBOR manipulation.