Tech Stocks Soar to Dot-Com Heights, Raising Questions of Sustainability
• Economist warns top 10 S&P 500 companies today more overvalued than 1990s dot-com bubble • Nvidia becomes first semiconductor company valued at $2 trillion amid AI boom • Nvidia stock dipped on worries rally went too far, but beat earnings expectations • Some analysts say Nvidia's soaring performance raises questions of how long it will last • Citigroup study finds AI stock rally not necessarily a bubble based on earnings performance