Shares of biotechnology companies were mixed in morning trading Monday ahead of a major cancer conference this week, while the broader market gained ground on declining oil prices and a strengthening dollar.
ImClone Systems Inc. fell after Morgan Stanley downgraded the biotech to "Underweight," or "Sell," from "Equal Weight."
Here's how several key biotechnology stocks performed Monday:
ImClone, down $2, or 4.5 percent, to $42.85.
Celgene Corp., down 4 cents to $62.45.
Amgen Inc., up 35 cents to $42.40.
Biogen Idec Inc., up 98 cents to at $63.05.
Genentech Inc., down 46 cents to $68.07.