The Treasury Department is on board with a risk-sharing mandate from the Federal Housing Finance Agency that sets a $30 billion goal this year for Fannie Mae and Freddie Mac. That’s the word from FHFA officials who discussed the matter with Inside The GSEs, but who did not want to be identified by name. “Treasury has taken a great interest in these things,” said one FHFA official. “They’re not ignoring what we’re doing.” The Treasury Department did not return telephone calls about the matter.