Among other stocks making big moves:
— Walt Disney fell $2.98, or 6 percent, to $47.06 after it said that advertising sales were flat at its ESPN unit, raising concern about the outlook for growth.
— Online deals company Groupon slumped $1.16, almost 30 percent, to $2.76 after it disclosed late Thursday that it was hurt by the economic problems in Europe and growth failed to meet expectations.
— J.C. Penney dropped $1.05 cents, or 4.8 percent, to $20.64 after the company reported a loss that was larger than investors were expecting. Shoppers have been abandoning the store after it got rid of blockbuster sales in favor of everyday low prices.
— Kayak Software surged $8.63, or 28 percent, to $39.67 after the company said it had agreed to be bought by rival travel website Priceline.com.
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