NEW YORK (AP) -- Shares of some top biotechnology companies are down at 10 a.m.:
Amgen Inc. fell $.78 or .7 percent, to $103.75.
Biogen Idec fell $4.46 or 1.9 percent, to $228.61.
Celgene Corp. fell $2.11 or 1.7 percent, to $121.33.
Gilead Sciences Inc. fell $1.41 or 2.5 percent, to $54.52.
