In the first 6 months of 2011, the total outstanding notional [amount] of all derivatives rose from $601 trillion at December 31, 2010 to $708 trillion at June 30, 2011. A $107 trillion increase in notional in half a year. Needless to say this is the biggest increase in history. So why did the notional increase by such an incomprehensible amount? Simple: based on some widely accepted (and very much wrong) definitions of gross market value (not to be confused with gross notional), the value of outstanding derivatives actually declined in the first half of the year from $21.3 trillion to $19.5 trillion (a number still 33% greater than US GDP). Which means that in order to satisfy what likely threatened to become a self-feeding margin call as the (previously) $600 trillion derivatives market collapsed on itself, banks had to sell more, more, more derivatives in order to collect recurring and/or upfront premia and to pad their books with GAAP-endorsed delusions of future derivative based cash flows.