Pfizer (NYSE:PFE) fell by 3.10% to trade at $40.63 by 12:21 (17:21 GMT) on Monday on the NYSE exchange.
The volume of Pfizer shares traded since the start of the session was 12.08M. Pfizer has traded in a range of $40.61 to $41.96 on the day.
The stock has traded at $44.1200 at its highest and $40.6300 at its lowest during the past seven days.
