My theory if you like is they waiting with the news so weak holders sell for the benefits of the bigger holders that paid huge premium to the current level and now can somewhat balance the books buying the lows......
Sound like personal greed and probably criminal action by those guys, I hope and fully expecting the company to complete thorough investigation and act to resolve that shenanigans as quickly as possible and for the best interest of share holders.
Another (big....) box ticked, and will give additional reassurance although you always get the same doubters to find the negative side....who cares.....