Stocks fell after an unexpected jump in jobless claims, and as the dollar rose on comments from European Central Bank President Jean-Claude Trichet.
The Dow Jones Industrial Average fell more than 75 points after slumping on weak economic newson Wednesday.
Among Dow components, Chevron, Verizon and Exxon Mobile slid, while Cisco gained.
The health insurance company's first quarter earnings surged, helped by membership growth in its health care plans. The insurer also raised its full-year forecast.
The fast-food company was downgraded to neutral from overweight at Piper Jaffray. The firm saw tougher comps and expects higher gas to impact sales.
The Long Island City, N.Y.-based company reported a higher than expected first quarter profit on strong sales of fashionable shoes and boots. The footwear company has also raised its yearly forecast.
The health care company, which makes Botox, was downgraded to sell from buy at CLSA.
The communications equipment company soared after reporting upbeat third quarter results.
The shoe and apparel manufacturer took a big hit after it reported a lower than expected quarterly profit.
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