>>69650112Look at it within the context of a month's time. It's a good comeback today, but their stock price is still suffering hard in the wake of the EN drama.
And like anons said, you have to remember that they announced on December 18 that they would buy back a lot of shares for up to 2.5 billion Yen (or 16-17 million USD), and they did this around December 19 to January 19.
Depending on how much stocks they bought at what price, their investment might be in the red because of EN's antics. And if it's still not doing well after a few months, expect drastic measures to be taken, which could have negative implications on the company over all. And that's not a good thing.