Legendary investor Warren Buffett's Berkshire Hathaway continued to bet big on Apple over the fourth quarter 2017, raising its stake in the tech giant by 23.3 percent to hit 165.3 million shares, according to a Securities and Exchange Commission filing. Alongside the boosted stake in Apple, Berkshire Hathaway dumped 94.5 percent of its IBM holdings over the three months ending 2017, reports CNBC. If the fund still owns its recently reported Apple holdings, the 165.3 million shares are worth about $27.7 billion at the end of trading on Wednesday. Buffett has steadily increased his stake in Apple after taking a first bite in 2016 worth $1 billion. At the end of that year, Berkshire's position moved up to 57.4 million shares worth some $6.64 billion, but that figure quickly jumped to