Check out the companies making the biggest moves midday: TreeHouse Foods — The food processor rallied 23% after announcing it's being bought by European investment group Investindustrial for $22.50 per share in cash. That represents an 18% premium from Friday's close. The deal values TreeHouse at nearly $3 billion. Tech stocks — Names tied to the artificial intelligence trade roared back on news of a possible end to the U.S. government shutdown, which contributed to investors' risk-on attitude. Nvidia jumped nearly 3.5%, while AMD rose about 3.8%, and Broadcom gained 1.7%. Each of the "Magnificent Seven" stocks were in the green, with gains in Alphabet and Tesla leading the pack. Six Flags Entertainment — The amusement park operator fell 7% following a downgrade to equal weight from overwe

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