... we pointed out an observation from Goldman's Prime Broker desk, which noted that halfway through the week, Goldman traders saw the "largest global short sales since May" with the GS Prime book was net sold yesterday (-0.9 SDs vs. the average daily net flow of the past year), driven by short sales outpacing long buys 1.7 to 1." In fact, the mid-week puke wasn't so much selling as short-selling, as "modest net selling (-0.5 SDs) was driven by short sales outpacing long buys 1.5 to 1."