Republicans are poised to introduce a bill that would codify reforms of the GSEs that have been completed administratively. The bill would also establish a utility model framework for Fannie Mae and Freddie Mac and alter how calculations are made to annual changes in loan limits.

Bill Ackman’s plan calls for Treasury to forgive its senior preferred shares, a strategy that some industry observers say would be politically risky for President Trump.

Securities industry stakeholders say preservation of the secondary mortgage market, especially MBS futures trading on the TBA market, is essential to keeping mortgage rates low.