Delta was never traded for more than $31 you twit. All Yahoo did was TIMES TEN the $31 after the reverse split. What Yahoo did on their chart doesn't take away from the truth. It's a lie as well as your post.
"the situation of the company is not substantially different from what it was 3 years ago"
You must have missed the news. There is a worldwide glut of natural gas. Very competitive, prices at a multi-year low. Revenues declining every year. Costs INCREASING every year. Last quarter's net loss was about 94% of their book value. Yahoo has not yet updated it. Don't believe that $16+ per share book value. At the end of last quarter it was about a dollar. By today is is probably less than zero.