Core Viewpoint - The significant investments by US tech giants in AI could lead to substantial stock price fluctuations, with potential malinvestment risks highlighted by investor Bill Gross [1][2]. Investment Trends - Major tech companies, including Amazon, Meta, Microsoft, and Oracle, are projected to invest over $300 billion in AI this year [4]. - The focus is on AI data centers, with "hundreds of billions" being allocated for infrastructure such as microchips and servers [3]. Market Performance - The stock prices of the nine most valuable tech companies have more than doubled since the beginning of 2023, with Nvidia increasing approximately 12-fold and Meta around six-fold, leading to a combined market value exceeding $22 trillion [5].