(NEW YORK)Shares of some top biotechnology companies were down at the close of trading: Amgen fell $2.22 or 3.5 percent, to $60.88.READ MORE

(NEW YORK)Shares of some top biotechnology companies are down at noon: Amgen fell $1.34 or 2.1 percent, to $61.76.READ MORE

(NEW YORK)Shares of some top biotechnology companies are down at 10 a.m.: Amgen fell $.30 or .5 percent, to $62.80.READ MORE

(NEW YORK)Shares of some top biotechnology companies were mixed at the close of trading: Amgen rose $.59 or .9 percent, to $63.10.READ MORE

(NEW YORK)Shares of some top biotechnology companies are mixed at noon: Amgen fell $.31 or .5 percent, to $62.20.READ MORE

(NEW YORK)Shares of some top biotechnology companies are mixed at 10 a.m.: Amgen rose $.40 or .6 percent, to $62.91.READ MORE

(NEW YORK)Shares of some top biotechnology companies were down at the close of trading: Amgen fell $.34 or .5 percent, to $62.51.READ MORE