Some of China's most respected hedge fund managers are warning that the rapid surge in artificial intelligence-related stocks may have moved beyond sustainable valuations. According to market reports, enthusiasm surrounding AI has driven many technology companies to prices that may no longer reflect their current earnings or realistic near-term growth prospects. The AI investment boom has been fueled by advances in large language models, cloud computing, semiconductor demand and enterprise software. Investors worldwide have poured billions into companies viewed as beneficiaries of the AI revolution, causing valuations to rise dramatically over the past two years. Portfolio managers caution that while artificial intelligence is expected to transform numerous industries, the pace of stock appreciation has significantly outperformed actual business fundamentals. Many firms generating modest AI-related revenue are trading at exceptionally high valuation multiples based primarily on future expectations. Historically, emerging technologies often experience periods of excessive optimism before markets separate long-term winners from speculative investments. Similar patterns were seen during the internet boom, renewable energy rallies and early electric vehicle expansions. Supporters of current valuations argue that AI represents a once-in-a-generation technological shift capable of reshaping healthcare, finance, manufacturing, education and cybersecurity. They believe today's premium prices reflect future productivity gains rather than short-term earnings. Skeptics, however, note that increased competition, high infrastructure costs and uncertain monetization strategies could limit profitability for many companies entering the AI sector. Global investors are therefore becoming more selective, focusing on businesses with strong cash flow, proven products and sustainable competitive advantages instead of purely speculative AI narratives. Whether the sector experiences a correction or continues higher will largely depend on corporate earnings, adoption rates, economic growth and monetary policy over the coming quarters.