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• General Mills Inc. dropped 1 percent after reporting that its quarterly profit sank 28 percent. The maker of Cheerios and Yoplait yogurt blamed higher costs for ingredients and packaging for pinching profit margins.

• AT&T Inc. rose 1.3 percent after the company abandoned its bid late Monday to acquire the wireless provider T-Mobile USA. Sprint Nextel Corp. gained 5 percent. Sprint, the No. 3 wireless carrier, opposed the deal.

• Red Hat Inc. plunged 8.9 percent after the software company forecast revenue that was short of what analysts were expecting. Red Hat provides support to business users for the freely distributed Linux operating system.

• Oracle Corp. dropped 8 percent in extended trading after the business software giant’s quarterly earnings and sales missed analysts’ estimates.