— Chipmaker Micron Technology Inc. rose 7.7 percent after a Japanese rival company filed for bankruptcy protection.
— Warren Buffett's Berkshire Hathaway Inc. rose 0.3 percent after the investor, known as the Oracle of Omaha, said the company has a successor in mind, plus two backups. Berkshire has not named those executives.
— Netflix stock fell 2.2 percent after a downgrade by an analyst at Raymond James.
— Shares of Sprint Nextel Corp. rose 3.2 percent after reports that its board rejected a purchase of MetroPCS Communications. MetroPCS fell 1.5 percent.
— Lowe's, the home improvement chain, rose 0.7 percent after reporting a 13 percent jump in fourth-quarter profits.
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