One of the more interesting paragraphs from S&P's downgrade of the US debt outlook focuses on the financial sector:

Additional fiscal risks we see for the U.S. include the potential for further extraordinary official assistance to large players in the U.S. financial or other sectors, along with outlays related to various federal credit programs. We estimate that it could cost the U.S. government as much as 3.5% of GDP to appropriately capitalize and relaunch Fannie Mae and Freddie Mac, two financial institutions now under federal control, in addition to the 1% of GDP already invested (see "U.S. Government Cost To Resolve And Relaunch Fannie Mae And Freddie Mac Could Approach $700 Billion," Nov. 4, 2010, RatingsDirect). The potential for losses on federal direct and guaranteed loans (such as student loans) is another material fiscal risk, in our view. Most importantly, we believe the risks from the U.S. financial sector are higher than we considered them to be before 2008, as our downward revisions of our Banking Industry Country Risk Assessment (BICRA) on the U.S. to Group 3 from Group 2 in December 2009 and to Group 2 from Group 1 in December 2008 reflect (see "Banking Industry Country Risk Assessments," March 8, 2011, and "Banking Industry Country Risk Assessment: United States of America," Feb. 1, 2010, both on RatingsDirect). In line with these views, we now estimate the maximum aggregate, up-front fiscal cost to the U.S. government of resolving potential financial sector asset impairment in a stress scenario at 34% of GDP compared with our estimate of 26% in 2007.