On October 6, 2025, shares of Advanced Micro Devices (AMD) soared nearly 25% after announcing a strategic partnership with OpenAI, the creator of ChatGPT, leading to AMD’s selection as a key AI chip supplier. This collaboration boosted AMD’s stock, making it the top performer in the S&P 500, which rose by 0.4% overall. Other AI-related stocks, including Monolithic Power Systems and Super Micro Computer, also experienced gains. Meanwhile, AppLovin’s share price plummeted 14% due to reports of a Securities and Exchange Commission (SEC) investigation into its data collection practices, despite an impressive 80% rise in 2025. Tesla saw a 5.5% increase after hinting at a possible announcement of lower-priced electric vehicles. Verizon stocks fell 5.1% as the company appointed former PayPal CEO Dan Schulman as its new CEO amid ongoing acquisitions. This trading day showcased significant developments within the technology and semiconductor sectors.
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