Giving specific dates often causes stocks to react funny..... might run up leading to the date. May have caught some MM'S off guard and they want to get the price lower first. Who knows. TTPH putting out news of their corporate update is GOOD NEWS.... regardless of how the stock reacts in the short term.
Hopefully this "update" outlines precisely what their plans are for eravacycline, shows they have plenty of cash still, and hopefully the market as a whole is doing well next week when they announce this.