Check out a blurb on C. Scwhab's website about this proposed deal. This could be the reason that we are surging this week.
Sentiment: Strong Buy
The fact is that DDD is in fact in talks with XONE. Do a google search and you will find a few recents new releases.
I can't find any reference that Dupont and Exone have had talks. Do you have a link?
I know that DD or GE are interested in XONE, wonder if we will get into a bidding war?
OK I'll bite. How do you "know'? More likely, what do you think you know?