Investing.com - Merck&Co fell by 3.09% to trade at $79.90 by 10:42 (14:42 GMT) on Monday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was $1.29M. Merck&Co has traded in a range of $79.90 to $82.47 on the day.
The stock has traded at $83.2500 at its highest and $74.0300 at its lowest during the past seven days.