Then MACK's management is pretty dumb for releasing a PR today stating, once again (according to you), that the drug failed.
Who knows: Maybe management will release the same information again two months from now, and the stock will drop another 20%.
Is this the sort of company you want to be invested in? A company run by people who seemingly have zero clue how to properly run a publicly traded company; have absolutely no market savvy; are unable to manage the investment community's expectations; etc?
Perhaps you're the one who "doesn't understand"...