The fact that there's 4 major investors (billionaires) that are backing your trade. Here's who owns what in DNDN:
Ken Griffin of Citadel Advisors - $15,000,000 of DNDN shares.
Steve Cohen of SAC Capital - 1 Million shares of DNDN acquired last quarter of 2010.
George Soros - 4 Million shares of DNDN.
David Shaw of DE Shaw - 1,300,000 shares of DNDN.
Even if we can't track exactly when and what price, the third chart below clearly shows volume accompanied accumulation over the last year. I circled the volume bars in the yellow ovals.
Here's a link to a recent Forbes article publishing the above investors' holdings.
As far as recent events are concerned, as most of us know, DNDN received FDA approval for late stage prostate cancer treatment, causing the initial meteoric rise. Another notable recent event is the approval of Medicare to sponsor the expensive $93,000 treatment. I'm more into DNDN currently for the technical setup, but nonetheless it's still important to know the basic fundamentals:
I own DNDN since $36 and $37, where it confirmed the breakout from the year-long descending trendline and crossed over it's 50-SMA. Notice if you view the May options chains, that the open interest is owned in high volumes all the way up to the $50 strike. What's interesting is the activity on the $45 strike, where Friday's volume was nearly 50% of the current open interest. Similar activity is noticeable in the later dated contracts, especially the August contracts. I personally own Aug 45 calls, as well as the shares. The options I'm holding are currently a double from where I've held them. In my opinion, since options have a clearly defined risk, that is the best way to play DNDN, since you can only lose your committed capital. I own the shares, too but I'm prepared to let those go with a tight stop if things turned south quickly. This does not eliminate the risk of a gap down.
Best of luck to all. If you found this information informative or have any suggestions, please join us for discussion in the comments below.