Yahoo Finance·2025-11-20 14:49Group 1 - Microsoft and Amazon were downgraded to "neutral" by Rothschild & Co. due to high AI spending and uncertainty regarding future profits [1][6] - The Nasdaq 100 index has experienced a decline of approximately 6% recently, raising concerns about an AI bubble and investor sentiment [1][2] - Amazon Web Services reported a 20% growth in the third quarter, with AI contributing positively to its mature cloud business [6] Group 2 - Microsoft and Amazon are heavily investing in AI, but there is uncertainty about the returns on these investments [4][5] - The leadership of both companies, including CEOs Satya Nadella and Andy Jassy, supports the significant AI expenditures, indicating confidence in their long-term value [4][5] - Amazon is expanding its robotics initiatives, including the rollout of its Zoox robotaxi in select markets [6]