Hi I'm trying to understand the significance (if any) of the figures in the last two columns (#8 and #9 on the right) of FCM financial data published by the CFTC. http://www.cftc.gov/files/tm/fcm/tmfcmdata0611.pdf For example, when examining the numbers for Goldman Sachs Execution & Clearing LP and Interactive Brokers LLC, I notice that the column #9 figure is low (relative to the three capital data in columns #5, 6 and 7) for Goldman and high for IB. If any fellow ET member knows enough about the inter-relationship between the data in columns #5 to 9, it'd be much appreciated if he'd provide a brief layman's explanation to them. Thanks!