The pressure started when it dropped below $16 two or three weeks ago after breaking a 52 week high and then the tend started to reverse.
After ISIS broke $20 another barrier was broken and we very well may never see the stock drop below $20 with out a split.
Three trading days to go from $19.XX to 22.1X is already part of shorts covering, but a slow one. People are re-shorting or adding to their shorts as well.
Lets hope for a slow climb. If it goes to high to fast it will most likely pull back 50% or more. I'd like to uninvited active traders to the party. Wouldn't be surprised if there was a pull back below $21 before it goes higher OR if it climbed 2-5% a day for the rest of the week.
There hasn't been much change as far as potential milestone payments or pipeline, except for the Roche deal. Lets all get excited when they get the first royalty check for Kynamro.