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• Apollo Group, a for-profit education company which operates the University of Phoenix, soared 10 percent. The company reported quarterly income that was far larger than analysts had expected. The company’s stock rose $3.34 to $35.81.

• Seagate Technology gained 4 percent. The maker of hard disk drives is going to replace Progress Energy in the S&P 500 index. As a result, fund managers, whose performance is measured against the S&P index, are more likely to buy Seagate. The stock rose 85 cents to $24.12.