The MM, facilitated by large funds/banks will run stops, short large block HFT shares, throw out a piece of skewed bad news from the results--all to facilitate selling and provide reason but most important, accumulate cheap shares.
When they have enough, expect a reversal, gap up even.
and such "shakeouts" may continue for 132 sessions ... that would bring us to Oct ... and then the tax-loss selling would ensue until Nov 20th! Low and behold ... you get to buy a bargain at 17 again! LoL! :-)