special asset pool special asset pool ( sap ) , which constituted approximately 28% ( 28 % ) of citi holdings by assets as of december 31 , 2009 , is a portfolio of securities , loans and other assets that citigroup intends to actively reduce over time through asset sales and portfolio run-off . at december 31 , 2009 , sap had $ 154 billion of assets . sap assets have declined by $ 197 billion or 56% ( 56 % ) from peak levels in 2007 reflecting cumulative write-downs , asset sales and portfolio run-off