Wall Street’s AI train is still steaming ahead, even after the technology’s leaders called for a slowdown.Microsoft was among the hyperscalers that saw their stock prices rise Monday.A week of alarming headlines about AI’s potential to destroy civilization culminated Saturday with Anthropic’s Dario Amodei, OpenAI’s Sam Altman, Elon Musk of xAI and Demis Hassabis of Google’s DeepMind each affirming the need to curb development of the technology.Investors listened, nodded solemnly—and then proceeded to buy more AI stocks.Shares of Microsoft, Alphabet and Meta Platforms—three of the biggest so-called AI-hyperscalers—all advanced 2% or more Monday. They and others benefited from a rotation…