Investing.com - Merck&Co rose by 3.12% to trade at $78.95 by 09:55 (14:55 GMT) on Monday on the NYSE exchange.
The volume of Merck&Co shares traded since the start of the session was $2.17M. Merck&Co has traded in a range of $77.10 to $78.95 on the day.
The stock has traded at $82.6300 at its highest and $74.2100 at its lowest during the past seven days.