The weakness was primarily in the tech sector, with four of the six trillion-dollar tech giants falling, and Nvidia—currently ranked no. 2, with a $3.1 trillion market cap—dropping 2.3%. There was no strong reason, beyond the fact that Nvidia is slated to report its quarterly results Wednesday. Nvidia's stock has surged nearly 12% over the last month following some slippage in July on rumors of a delay for its highly anticipated line of AI chips branded as Blackwell.