There was also a much different climate surrounding those conference calls. i.e. patent issues, uncertainty regarding Phase 3 Omthera results etc. This near to the PDUFA, I am not sure what will happen. I will say, that the odds would seem to be in favor of bucking that trend, as the sentiment has been very bullish, and just based upon the low probability of getting the same results everytime you have an earnings report.
I think the last buying was caused by the latest buyout rumors. Stock climbed +$2. It's time for a pullback. Also, stock should be halted if there was a buyout news. Too many weak hands will sell after earnings. I know nobody is playing AMRN for earning results but you won't believe how many people buying AMRN has no idea about biotech stocks.