The FHFA said in a statement Wednesday that it hasn't determined specific losses from LIBOR for the two companies and hasn't decided whether to pursue legal action against the banks.
"We continue to evaluate issues associated with LIBOR and monitor LIBOR-related developments," the agency's statement said.
Spokesmen for Fannie and Freddie declined to comment.
The LIBOR scandal is likely to make headlines again in coming weeks and months. Other big global banks in several countries also are being investigated for rigging the rate and are expected to be fined.