Core Viewpoint - The article discusses the perceived "bubble" in the Nasdaq 100 index, arguing that the index's performance is primarily driven by substantial earnings growth rather than inflated valuations [3][4][5]. Valuation and Earnings Growth - The Nasdaq 100 index currently has a five-year PE ratio of 36.8, which is above the median of 34.4, indicating a relatively high valuation [8]. - The total profit of Nasdaq 100 constituents grew from $256.5 billion in the first three quarters of 2020 to $718.2 billion in 2025, representing a 180% increase, while the index itself rose approximately 170% [9][10]. - The article emphasizes that if only valuation were considered, the Nasdaq should have been sold off five years ago, but the sustained high valuation has been justified by significant earnings growth [10][11]. Performance of Individual Stocks - A detailed analysis of individual stocks within the Nasdaq 100 shows remarkable profit growth over five years, with companies like Nvidia achieving a 3400% increase in net profit, and Tesla seeing a 1500% increase [15][16]. - Other notable performers include Apple (82%), Microsoft (119%), and Amazon (353%), indicating that many tech companies have thrived due to continuous innovation and investment [15][16]. Factors Behind Strong Performance - The article attributes the strong performance of U.S. tech stocks to a combination of technological innovation and a robust business model that generates recurring cash flow [19][20]. - The presence of a protective environment for private property and patents in the U.S. has facilitated significant returns on new industry investments, reinforcing the success of the tech sector [21]. AI and Future Outlook - The discussion raises the question of whether AI represents a bubble, suggesting that those at the forefront of AI technology are unlikely to view it as such due to its vast potential applications [22][23]. - The article warns that while the current tech revolution is significant, historical patterns indicate that growth cycles will eventually slow, leading to potential declines in both growth rates and stock valuations [24][25].