nm not meaningful 2009 vs . 2008 revenues , net of interest expense increased $ 35.9 billion in 2009 , primarily due to the absence of significant negative revenue marks occurring in the prior year . total negative marks were $ 1.9 billion in 2009 as compared to $ 38.1 billion in 2008 , as described in more detail below . revenue in the current year included a positive $ 1.3 billion cva on derivative positions , excluding monoline insurers , and positive marks of $ 0