The regulator for Fannie and Freddie wants to reduce the use of FICO for housing credit, while factoring in borrowers’ rent ...

Ackman isn’t the only hedge fund investor who bet on Fannie and Freddie after the government seized them during the 2008 financial crisis, when both were on the brink of collapse.

None has been more vocal than billionaire investor Bill Ackman, whose hedge fund, Pershing Square Capital, is one of the largest holders of common shares in Fannie and Freddie.

A group of investors has been anxiously awaiting the day Fannie and Freddie return to the public markets. None has been more vocal than billionaire investor Bill Ackman, whose hedge fund, Pershing ...

Bill Ackman, Founder and CEO of Pershing Square Capital Management, is one of the largest and most vocal shareholders of Fannie Mae and Freddie Mac.

Bill Ackman, Founder and CEO of Pershing Square Capital Management, is one of the largest and most vocal shareholders of Fannie Mae and Freddie Mac. - Patrick T. Fallon/AFP/Getty Images ...