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.

Asian shares are mixed after gains for oil-and-gas producers helped offset drops for Nvidia and other Big Tech companies on Wall Street.