Investing.com - Merck&Co fell by 3.46% to trade at $76.53 by 09:35 (13:35 GMT) on Thursday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was $813.68K. Merck&Co has traded in a range of $74.14 to $78.05 on the day.
The stock has traded at $83.0700 at its highest and $74.4000 at its lowest during the past seven days.