OMAHA, Nebraska: Billionaire Warren Buffett has reduced Berkshire Hathaway's massive Apple stake, a move that could rattle the stock market as a whole, given the high-profile investor and the relative lack of positive financial news lately.

OMAHA, Nebraska: Billionaire Warren Buffett has reduced Berkshire Hathaway's massive Apple stake, a move that could rattle the stock market as a whole, given the high-profile investor and the relative lack of positive financial news lately.