Prominent hedge fund managers sold out of Chinese technology stocks and dumped Silicon Valley majors such as Apple and Facebook while global stock markets cratered during the fourth quarter, according to securities filings released on Thursday. Activist hedge fund Jana Partners sold its position in Chinese e-commerce giant Alibaba Group Holding and reduced its stake in Apple by about 175,000 shares, slicing its position in the company by 63 per cent. Warren Buffett’s Berkshire Hathaway...