最新报道：According to the Coinnet, stocks climbed to near-record highs on Monday as investors turned their attention away from tariff tensions and toward upcoming earnings reports from tech companies. The Dow Jones rose 220 points (0.52%), while the S&P 500 and Nasdaq rose 0.58% and 0.75%, respectively. Traders have flocked to tech stocks, awaiting key results from Alphabet and Tesla, both of which are set to report earnings on Wednesday. Market optimism is high, but valuations are also high, prompting warnings from economists who believe artificial intelligence is fueling a bubble. Torsten Slok, chief economist at Apollo, said valuations for top S&P 500 companies such as Nvidia, Microsoft and Apple now exceed the peak of the dot-com bubble era. Traders are racing to buy tech stocks ahead of key earnings reports. Notably, both Alphabet and Tesla will report earnings on Wednesday, the first of the major tech giants this quarter. Strong results could validate the market's optimism and high valuations. Still, the market's focus on the AI sector is increasingly reminiscent of the tech bubble of 1999. Torsten Slok, chief economist at Apollo Global Management, said the AI bubble could be worse than the dot-com bubble. Torsten Slok: "The difference between the IT bubble of the 1990s and the AI bubble today is that the top 10 companies in the S&P 500 are more overvalued today than they were in the 1990s" pic.twitter.com/OEervHU4WG Slok explained that the top 10 companies in the S&P 500 are more highly valued now than they were in the 1990s. Specifically, he compared the price-to-earnings ratios of major companies such as Nvidia, Microsoft, and Apple and found that they are higher than the absolute peak of the dot-com bubble. In addition, traders remain concerned about U.S. trade policy as tensions with the European Union escalate. The EU is preparing trade retaliation if it fails to reach an agreement with the United States. The Wall Street Journal quoted a German official as saying about the trade talks: "If they want war, they'll get war." This is a response to President Donald Trump's escalating demands on the European Union and other trading partners. Previously, Trump pushed for tariffs of at least 20% on EU goods, higher than the previously proposed 15%. On the other hand, the EU aims to obtain a base tariff of 10% with special consideration for certain industries.