Nvidia stock briefly touched a new record Tuesday following a high-profile speech from its billionaire leader Jensen Huang, but surprisingly reversed quickly to a significant daily loss, headlining a surprise stark selloff across technology stocks.

Uber drove 3.2% higher after the ride-hailing app said it would accelerate $1.5 billion in purchases of its own stock, part of a previously announced $7 billion buyback program. Uber’s chief financial officer, Prashanth Mahendra-Rajah, said it’s making the move because its stock price looks cheap compared with the strength of its business.

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