International Business Machines Corp. has climbed above the price that Warren Buffett paid for shares in the computer company, reversing more than $2 billion in paper losses for his Berkshire Hathaway Inc. IBM rose 2.2 percent to $170.55 at 4 p.m. Friday in New York after giving 2017 profit guidance on Thursday that was higher than analysts’ estimates. That compares with the average of $170.19 that Buffett spent for 81 million shares, according to Omaha, Nebraska-based Berkshire’s most recent annual report.