World's 4th richest person Buffett adds $4 billion in a day
World's fourth richest man and Berkshire Hathaway Chairman Warren Buffett added nearly $4 billion to his net worth on Wednesday after the company removed a cap on share buybacks. Berkshire Hathaway shares surged 5.1%, the most in almost seven years, lifting Buffett's fortune to $83.1 billion. Buffett on Tuesday donated around $3.4 billion of Berkshire Hathaway stock to charities. 