Apple Inc. is poised to boost its dividend by more than a half, according to analysts surveyed by Bloomberg, providing investors hit by a share slump with one of the highest yields in the U.S. technology industry.

Apple will probably lift its quarterly dividend 56 percent to $4.14 a share, for an annual payout of $15.7 billion, according to the average estimate from six analysts. The resulting yield of 3.7 percent would be higher than 86 percent of the companies in the Standard & Poor's 500 Index paying dividends. Apple could fund a payout with existing cash flow without using profit from overseas, which can be subject to extra taxes, said Gene Munster, an analyst at Piper Jaffray Cos.

Chief Executive Officer Tim Cook, who a year ago this month reinstated a dividend and announced a $10 billion buyback, faces mounting pressure to take bolder steps to pay out more of Apple's $137.1 billion in cash and investments. Investors including David Einhorn's Greenlight Capital Inc. are pushing for more money as growth slows and competition from rivals such as Samsung Electronics Co. intensifies.