A SPY block moves market by several points. We exaggerate. (Not really). Volume down, market up, volume up, market down. Rinse, repeat. Computers are happy as pigs in a trough as shorts refuse to even dip a toe in this busted market. China tightening? Greece collapse? Record debt overhang? Pulled IPOs and HY deals? Who cares. The algos are sniffing and providing liquidity.