Stocks closed markedly lower on Tuesday as fears of a bubble in artificial intelligence technology hammered markets for a fourth consecutive trading day.

The S&P 500 dipped 0.8% while the tech-heavy Nasdaq fell 1.1% as investors panicked over whether AI firms have been overvalued – extending a rocky tech rout into its third week.

US stock market futures fell today as the S&P 500 extended a three-day slide. Nvidia and Oracle dropped again as investors questioned high AI valuations and rising data-center debt. Dow futures slipped 140 points or 0.

AI pioneer Nvidia was again the heaviest weight on the market. The chipmaker's drop of 3.2% brought its loss for the month to nearly 11%, putting it in "correction" territory, or when a stock falls at least 10% from its previous high. The company is scheduled to report is third-quarter financial results on Wednesday.

Stocks finished lower on Monday, with the Dow Jones Industrial Average and S&P 500 suffering their third straight day of losses.

This ETF is beating the Dow by a better than 5-to-1 margin this year -- and thanks to its AI intersections, the good times could continue in 2026.

Nvidia's size and influence on the broader market mean its results will likely affect a wide range of investors.

SINGAPORE--Alphabet's Google DeepMind is opening a new artificial-intelligence research lab in Singapore, focusing on collaboration with governments, academic institutions and businesses across the Asia-Pacific.