Investopediaยท2025-10-06 21:30Group 1: Semiconductor Industry - Advanced Micro Devices (AMD) shares increased by nearly 25% after announcing a significant partnership with OpenAI, which includes a long-term deal for AI chip purchases and potential equity acquisition [2][7] - Other companies in AI infrastructure, such as Monolithic Power Systems (MPWR) and Super Micro Computer (SMCI), saw their shares rise over 5% following the AMD and OpenAI announcement [3] Group 2: Electric Vehicle Industry - Tesla's stock rose by 5.5% amid speculation of an upcoming event that may introduce a lower-priced electric vehicle, aligning with previous comments about more affordable models being available in Q4 2025 [4] Group 3: Adtech Industry - AppLovin (APP) shares fell by 14% due to reports of a Securities and Exchange Commission investigation into its data collection practices, despite an overall increase of about 80% for the year 2025 [5][7] Group 4: Telecommunications Industry - Verizon (VZ) shares dropped by 5.1% following the appointment of Dan Schulman as the new CEO, who is set to lead the company through its acquisition of Frontier Communications [6]