Talk of heading off AI's potential role in destroying humanity hurt some stocks and helped others, with major U.S. indexes edging lower. AI leaders are calling for a slowdown in development amid growing concerns about existential risks, but Wall Street continues to invest heavily in the sector. The mixed market reaction reflects uncertainty about how regulatory pressures and safety debates will impact the commercial trajectory of artificial intelligence.

While some companies face headwinds from heightened scrutiny, others benefit from increased focus on responsible AI development. The divergence underscores the tension between rapid innovation and mounting calls for caution from within the industry itself.