The Dow Jones Industrial Average was trimming an opening drop to turn positive early Friday, on the back of a pop in Apple Inc. Shares of Apple were contributing about 30-points to the price-weighted Dow after a report from CNBC late Thursday said Warren Buffett's Berkshire Hathaway Inc. acquired some 75 million additional shares of the iPhone maker during the first quarter. Shares of Apple were up about 3.4%, or $6.07, contributing about 40 points to the Dow, with a $1 move in any one of the blue-chip gauge's 30 components equating to a 6.89-point swing. The Dow was recently down up 201 points, or 0.8%, at 24,133. Meanwhile, the S&P 500 index was up about 0.7% at 2,648, while the Nasdaq Composite Index was trading slightly higher, up by 1% at 7,161. Apple is the largest company by market value and tends to have an outsize influence on market-value weighted indexes like the Nasdaq and S&P 500.