When you invest in a company that only has news every 6 months, this is the kind of crap that can be counted on to happen. Especially where markets have become the playthings of those with mainframe/supercomputers, Ph.D's in math, and the encouragement and support of the exchanges, who always get their cut.
It is my personal opinion that the selling is way, way overdone, and it happens for one simple reason: shorting biotechs is a great way to make money. Most drugs fail, and most small biotechs with only clinical stage drugs struggle mightily to survive financially. If you short every small biotech....really, every single one....you'd probably come out way ahead. I personally think it's appalling and disgusting to short a company that may have a life changing drug, but that's just my own opinion. I've also never shorted any stock in my life, so maybe I'm not a good judge of this. Without going off topic too far, I owned Dendreon (DNDN). I think Provenge worked. But SAC Capital, lead by billionaire Steve Cohen, shorted the company mercilessly and with impunity. Naked shorting to the point where I think there was actually more shares short than shares outstanding....which we know can't be possible in a regulated system. But SAC Capital (and other shorts) capitalized on something they knew would be a problem for DNDN: tumors shrank from the inside, so tumor size didn't change as the tumor died. Clinical trial needs to show tumor shrinkage, and SAC knew it. So they kill the company. Now, maybe I just made a bad investment. Maybe Provenge didn't actually work and I'm wrong. But the company got shorted into oblivion and it's hard to ever know what might have been.
That's my very long winded way of saying no, I don't think MRKR is faking it (not that you were implying it). But shorts don't have to stop just because they've made a fortune. They went all in at what....high $8.00 range? You'd think they would have covered after the 25% drop last week. But no, they'll drive a stock to zero if they can. I'm sure Steve Cohen would drive a stock to a negative number if he could (and I really hope for his sake and other huge shorts that they don't one day need the drugs they drove out of existence). In the end, they'll know when/if they have to cover. The shorts always seem to know before everyone else. Just like they knew our positive pancreatic cancer data would be viewed negatively when announced. MRKR is going to $30 or more per share, and I'll be here when it does. I'd love to think that big time shorts will get squeezed and be bankrupted in the mother of all short squeezes. The honest likelihood though is they'll cover and go long with options in advance, and have made a ton on the way down and make a ton more on the way up.
Sorry, that's my rant for the day. I'll go back to quietly reading posts as I usually do. Carry on, everyone....