NYSE

U.S. stocks plunged on Tuesday, following sell-off in European and Asian stock markets on escalating fears of a nuclear crisis after a radiation leak was detected at the Fukushima Daiichi nuclear plant.

Intel is said to join hands with Taiwan-based notebook makers to push in to Android tablet PC market, a move after Microsoft said its Windows operating system will add support for ARM-based platforms.

Motorola Mobility is said to have missed the early market opportunity as the initial sales of Xoom is rumored to be weak.

U.S. stocks plunged in early trade on Tuesday, following sell-off in European and Asian stock markets amid fears of a nuclear disaster in Japan.

Oppenheimer lowered its profit forecast on phone giant Nokia as the company is seeing greater than market seasonal weakness in demand in the first quarter of 2011.

The companies whose shares are moving in pre-market trade on Tuesday are: First Solar, Netflix, MEMC Electronic Materials, U.S. Bancorp, American International Group, Capital One Financial, Motorola Mobility Holdings, Advanced Micro Devices and Jds Uniphase.

Texas Instruments said it expects loss of revenue in the first quarter and second quarter as the Japan earthquake caused substantial damage to its Miho plant in the country.

U.S. stocks ended lower on Monday, as investors were worried about the impact of the devastating earthquake and tsunami in Japan on the global economy.

The top after-market NYSE gainers on Monday are: Heckmann, Transcananda, Aspen Insurance Holdings, Clean Harbors and KBR, Inc. The top after-market NYSE losers are: Callon Petroleum, American Oriental Bioengineering, Universal Travel, Dole Food and Wuxi Pharmatech.

U.S. stocks ended lower on Monday, as investors were worried about the impact of the devastating earthquake and tsunami in Japan on the global economy.

U.S. stocks declined on Monday, as investors were worried about the impact of the devastating earthquake and tsunami in Japan on the global economy.

Léo Apotheker, the Chief Executive Officer of PC giant Hewlett-Packard (NYSE: HPQ), is expected to hold an investor briefing on March 14 in San Francisco where he may unveil his much anticipated vision for HP.

U.S. stocks declined in early trade on Monday, as investors were worried about the impact of the devastating earthquake and tsunami in Japan on the global economy.

Since, Japan is one of the world's largest economies, it is said that business activities of some of the U.S. communication technology (CommTech) companies could be disrupted in near term.

The companies whose shares are moving in pre-market trade on Monday are: Cintas, MEMC Electronic Materials, First Solar, Micron Technology, Xilinx, Southwest Airlines, Exelon, NRG Energy, American International Group and Aflac.

Warren Buffett's Berkshire Hathaway said it has agreed to acquire additives maker Lubrizol for $135 a share in cash, or $9 billion, making it one of the largest acquisitions in its history. Eli Lilly and Co. announced that it has made an irrevocable, unconditional offer to acquire the animal health business of Belgium-based Janssen Pharmaceutica NV, a Johnson & Johnson Co.

Warren Buffett's Berkshire Hathaway Inc. (NYSE: BRK.A, BRK.B) said it has agreed to buy chemical company Lubrizol Corp. (NYSE: LZ) for $135 a share in cash, or $9 billion, making it one of the largest acquisitions in its history.

U.S. stocks ended higher on Friday led by gains from oil refiners after the earthquake disrupted Japan's refining capacity and equipment makers advanced on expectations for increased demand from rebuilding efforts.

U.S. stocks ended higher on Friday led by gains from Oil refiners after the earthquake disrupted Japan's refining capacity and and equipment makers advanced on expectations for increased demand from rebuilding efforts.

Valero Energy Corp. (NYSE: VLO) said it has agreed to acquire Chevron Corp. (NYSE: CVX)'s Pembroke oil refinery in Wales, U.K., as part of a deal valued at up to $1.73 billion.

U.S. stocks plummeted on a slew of troubling developments, including a surprising trade deficit in China, a downgrade of Spain’s debt, along with fears over the impact on oil price by pervasive unrest in the Middle East and North Africa.