US STOCKS-Wall St rises with energy, materials; Berkshire deal a boost
* Precision Castparts jumps after Berkshire deal
* Disappointing China data boosts stimulus hopes
* Twitter up after NFL deal, CEO buys shares
* Indexes up: Dow 1.4 pct, S&P 1.3 pct, Nasdaq 1.2 pct (Updates to late afternoon, changes byline)
By Caroline Valetkevitch
Aug 10 (Reuters) - U.S. stocks climbed on Monday, bouncing back sharply from last week's losses, boosted by gains in energy and materials shares and optimism over Warren Buffett's latest deal.
Copper rebounded from six-year lows while oil prices also rallied, helping push the S&P 500 energy index up 2.8 percent and the materials index up 2.3 percent.
Disappointing economic data in China boosted hopes for additional stimulus from Beijing, while Greece and international creditors could wrap up a multi-billion euro bailout accord by Tuesday.
Buffett's Berkshire Hathaway said it would buy Precision Castparts in a deal valuing the company at $32.3 billion. Precision Castparts' shares jumped as much as 19.4 percent to $231.47, while Berkshire Class B shares dipped 0.2 percent to $143.27. Continuación...