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• Illumina, a diagnostics company, rose nearly 4 percent to $52.09 after the Swiss pharmaceutical giant Roche Group raised its offer for the company to $51 per share.

• Best Buy fell more than 9 percent after announcing big spending cuts, including plans to close 50 of its big-box stores.

• JetBlue fell more than 8 percent, two days after passengers said a pilot came unhinged and forced a JetBlue flight to make an emergency landing on a flight from New York to Las Vegas. The stock decline could also be related to higher oil prices, which cut into airlines’ profits.