Investing.com - Merck&Co fell by 3.43% to trade at $81.10 by 09:32 (13:32 GMT) on Tuesday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was $953.96K. Merck&Co has traded in a range of $80.66 to $82.15 on the day.
The stock has traded at $84.6700 at its highest and $78.2400 at its lowest during the past seven days.