Quick Soar while Being invetigated for Posible Breaches?

The U.S. is the new epicenter of the coronavirus pandemic with the highest number of cases and deaths around the world. U.S. reported a total of 1,159,240 coronavirus cases with around 67,710 deaths. With this, stocks shares shot up 153% to $12.03 after the company agreed to be acquired y Menarini Group in a transaction valued at up to $677 million. That's a lot quicker than we all thought. Can this stand for long while being under investigation company has obtained a Fair Price in its sale to Menarini Group