Drops for Nvidia and other tech stocks are weighing on Wall Street Monday and keeping it in its weekslong rut. The S&P 500 was down 0.4% in morning trading, coming off its fourth losing week in the last five.

Nvidia traded slightly higher after Jensen Huang's CES keynote. Traders are eyeing key economic data later in the week.

Nvidia Corp.’s $3 trillion run-up in market value in the two years since ChatGPT helped trigger an AI frenzy is bigger than any stock rally in history in such a short time span. But the landscape is now changing for the chipmaker.