Investing.com - Merck&Co fell by 3.01% to trade at $78.90 by 13:21 (18:21 GMT) on Tuesday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was $6.74M. Merck&Co has traded in a range of $78.90 to $82.40 on the day.
The stock has traded at $82.5900 at its highest and $74.2100 at its lowest during the past seven days.