Last Friday, when the market was down only 2%, we presented readers with a note which promptly became the most read piece across Wall Street trading desks, which was written by JPM's head quant Marko Kolanovic, who correctly calculated the option gamma hedging imbalance into the close, and just as correctly predicted the closing dump on Friday which according to many catalyzed Monday's "limit down" open.

Recall:

Given that the market is already down ~2%, we expect the market selloff to accelerate after 3:30PM into the close with peak hedging pressure ~3:45PM. The magnitude of the negative price impact could be ~30-60bps in the absence of any other fundamental buying or selling pressure into the close.

We bring it up because Kolanovic is out with another note, one which may be even more unpleasant for bulls who, looking at nothing but price action, were convinced that after the biggest two day market jump in history, the worst is behind us.