The Federal Housing Finance Agency and the Treasury Department illegally implemented the so-called sweep amendment last summer that altered Fannie Mae’s and Freddie Mac’s preferred stock purchase agreements to seize nearly all the two GSEs’ profits, in direct violation of the 2008 conservatorship legislation, according to investors’ lawsuits filed in federal court last week. Unlike the initial litigation filed by investors last month that challenges the entire 2008 government takeover of Fannie and Freddie, the separate suits filed by hedge-fund Perry Capital and by Fairholme Capital Management claim that Treasury’s August 2012 amendment to the preferred stock purchase agreements violated the Housing and Economic Recovery Act of 2008, which placed the GSEs in conservatorship.