Merck&Co Stock rose by 3.22% to trade at $81.48 by 15:19 (19:19 GMT) on Tuesday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was 9.93M. Merck&Co has traded in a range of $77.52 to $81.52 on the day.
The stock has traded at $83.0700 at its highest and $77.0000 at its lowest during the past seven days.
