Health-care stocks are leading the S&P 500's rebound Tuesday with the sector poised to snap a seven-session losing streak. The sector, which includes biotech stocks, had come under intense pressure after several years of strong performance. "Biotech fundamentals are still OK but the market is very touchy," said John Manley, chief equity strategist at Wells Fargo Advantage Funds. The health-care sector is up 1.6% with Vertex Pharmaceuticals Inc. jumping 5.2% and Biogen Inc. rallying 4.9%. The S&P 500 rose 0.3% to 1,887.
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