Quote from vulture:
The vertical nature of all of these illiquid program driven moves never ceases to amaze me. In the course of one day and about 7-10 ES points, the entire sentiment of the market can go from projections of SP 1400 back to projections of SP 1200. It's pretty clear that the quicker and more vertical the price action, the more it polarizes the bull and bear camp and creates this endless series of short term bull and bear traps.