Time Warner Inc. (NYSE: TWX) shares gained 8.6 percent to $35.09, on volume of 20.4 million shares, or triple its daily average, after the media company raised its dividend and reported stronger results.

Nvidia Corporation (Nasdaq: NVDA) traded in 32.2 million shares, trumping its daily average of 23.1 million. Prices for NVDA raced ahead 5.3 percent to $25.77.

Intevac Inc. (Nasdaq: IVAC) shares were off 8.9 percent to $12.65, on volume of 825,000, overwhelming a daily average of 101,000, after the manufacturing-equipment maker reported fourth-quarter and full-year revenue below estimates.