I know nothing about the company, but decided to look at their recent drop. I researched TRGT..hope that's the one you're referring to.
I get a drop from a high of $10.79/sh to $9.65/sh. A drop of $1.14...or roughly 10% of the high.
I also note that they had a pretty good pop today ($0.40...~4.5%).
I'm not sure (respectfully) whether your comparison is valid. The TRGT drop is 1/3 that of COR (percentage wise)....and did show a positive movement today. I think we've had close to 15 consecutive days of dropping. Some of them (like today...especially cruel)