US STOCKS-Wall St rises on Berkshire deal, China stimulus hopes
* Precision Castparts jumps after Berkshire deal
* Disappointing China data boosts stimulus hopes
* Twitter up after NFL deal, CEO buys shares
* IBM up after Buffett comments
* Indexes up: Dow 1.3 pct, S&P 1.2 pct, Nasdaq 1.1 pct (Updates to early afternoon)
By Tanya Agrawal
Aug 10 (Reuters) - Wall Street was up more than 1 percent on Monday, bouncing back sharply from last week's steep lows, buoyed by optimism around China and Greece, and as Warren Buffett's latest billion-dollar deal showed the M&A boom was alive and well.
Disappointing data out of 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 fell 1.4 percent to $141.60. Continuación...