NEW YORK - Shares of biotechnology companies closed mostly higher Tuesday with the broader market on a mix of rising oil prices and more positive sales figures for General Motors and U.S. factories exports.
How several key biotechnology stocks performed Tuesday:
Gilead Sciences Inc., down 78 cents to $52.17.
Amgen Inc., up $1.48, or 3.1 percent, to $48.64.
Biogen Idec Inc., up $3.45, or 6.2 percent, to $59.34.
Genentech Inc., up $2.66, or 3.5 percent, to $78.56.

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