"It should be noted that Fannie Mae’s obligation under this guaranty is solely Fannie Mae’s and is not backed by the full faith and credit of the U.S. government."
The UST and the Federal Reserve want strongly Capitalized GSES if the game plan has changed from Wind Down to recap and release, as it will be the 1st line of defense when the next inevitable US Housing Market downturn occurs.
Right now it's a 1.0-1.5% Capital Ratio, they probably need at a minimum 2.0-2.5%. The controversial current Capital Ratio Rule is up to 4.5%.
As I recall, when I worked at Fannie Mae (88-93) it was like 55 basis points (0.55%), which is plenty!