U.S. stocks fell after Anthropic CEO Dario Amodei called for a slowdown in artificial-intelligence development and as another increase in oil futures triggered interest-rate worries.

The decline reflects growing concerns that AI companies and the Federal Reserve will slam the brakes on growth. Amodei's remarks added to fears that regulatory or voluntary pauses could hinder the tech sector's rapid expansion.

Meanwhile, rising oil futures intensified worries that the Fed will maintain aggressive rate hikes to combat inflation. Higher rates typically pressure stock valuations, especially for growth-oriented AI firms.

The combination of AI slowdown fears and rate concerns weighed on major indexes, though specific index levels were not detailed in the report.