Merck&Co Stock fell by 3.24% to trade at $66.95 by 09:31 (13:31 GMT) on Wednesday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was 342.97K. Merck&Co has traded in a range of $66.95 to $68.14 on the day.
The stock has traded at $76.0700 at its highest and $65.2500 at its lowest during the past seven days.
