Investopedia·2025-09-15 22:00Group 1: Data Storage Companies - Shares of Seagate Technology surged 7.7% to a record high, driven by optimism around AI-driven demand for large drives to support AI data centers [4][8] - Western Digital's shares increased by 4.8%, also reaching an all-time high, following the announcement of planned price hikes across its hard disk drive product portfolio [4][8] Group 2: Lithium Producer - Albemarle, the world's largest lithium producer, saw its shares rise by 6.7% after news that a major lithium mine in China would restart production sooner than expected, despite concerns about oversupply conditions [5] Group 3: Technology Sector - Alphabet's shares gained over 4%, making it the fourth company to reach a $3 trillion market capitalization, bolstered by a favorable ruling in an antitrust case [6] - Arista Networks' shares advanced 4.3% as the company provided a positive long-term growth outlook during its analyst day [7][9] Group 4: Packaged Food Sector - J.M. Smucker's shares declined by 5.2% after an analyst downgrade, citing pressure on sales volumes due to price increases in response to supply chain issues and commodity cost inflation [11] Group 5: Agricultural Sector - Corteva's shares dropped 5.7% following reports of a potential plan to split its seed and pesticide businesses, which could help protect its seed business from liabilities related to pesticides [10]