MRK is -3% in AH trading and was -6% during regular trading—a cumulative loss of 10% relative to yesterday’s close, making today MRK's worst day since Vioxx.
Perhaps the EMA news leaked. Requesting withdrawal of an application is the polite way in which the EMA rejects an application.
MRK received FDA accelerated approval in this indication in May 2017 (#msg-131249474).
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”