Traders work on the floor of the New York Stock Exchange
Traders work on the floor of the New York Stock Exchange, February 22, 2011. REUTERS

US stocks jumped higher on positive news from Japan and AT&T’s (NYSE: T) acquisition of T-Mobile.

The S&P 500 Index is up 17.66 points, or 1.38 percent, to trade at 1,296.86 at 1:29 p.m. EST. The Dow Jones Industrial Average rallied 174.56 points, or 1.47 percent, to trade at 12,033.08. The Nasdaq Composite climbed 1.65 percent.

The latest news out of Japan have been positive; power is back on at the Fukushima Daiichi power plant and companies are beginning to resume operations.

The Japanese stock market was closed for a holiday but other Asian equities markets performed well on Monday.

“Markets have started the week with a calm risk-on tone,” said Elsa Lignos of Royal Bank of Canada.

The big corporate news coming out of the weekend was AT&T’s $39-billion acquisition of T-Mobile USA to create the largest wireless network in the United States.

AT&T shares are 1.3 percent on this deal.

The pick-up in M&A activity in recent quarters indicate that companies are feeling increasingly confident about the future.

[IBTimes coverage of the T-Mobile's acquisition:

-Sprint, Clearwire Likely To Merge: Analyst

-What does AT&T get from its $39 billion acquistion of T-Mobile?

-AT&T buys T-Mobile: What Does It Mean For Consumers?]

In the Middle East, a Libyan civil war rages on between pro- and anti- Gaddafi forces.

Crude oil futures have stabilized around $103 per barrel, below the recent high of $106.95 per barrel. This signifies that while the market is still uncomfortable with the potential impact of Libya’s turmoil on oil supplies, these fears remain contained in Monday’s session.