Buffett's Berkshire nears deal for Precision Castparts - source

(Reuters) - Warren Buffett's Berkshire Hathaway Inc is nearing an agreement to buy Precision Castparts Corp , in what could be the company's largest purchase ever, according to a person familiar with the matter. The purchase of Precision Castparts, which makes aircraft components and energy-production equipment, could be announced as soon as next week and cost more than $30 billion (£19.36 billion), assuming typical premiums for mergers, according to the Wall Street Journal, which fir