AMRI had a very good run in the last month up from 3.70 to 12.50. That terrific performance must have drawn in many small retail investors - the trend is your friend.
Everybody is expecting prices to go further north.
Everybody is invested.
Everybody thinks: I will sell right after earnings release to get the very top.
Everybody sells today to take profits but
Nobody is left to buy...for the moment.
Reminds me of AMRN and VVUS - right after positive news (FDA approval) the stocks crashed - buy the rumor sell the (good) news. With guidance raised I am fine for the moment, and willing to wait some month until priceds recover.