Warren Buffett's Single Biggest Mistake By Scalper1 | May 22, 2016 0 Comment Scalper1 News Berkshire Hathaway ‘s (NYSE BRK A) (NYSE BRK B) $1 billion purchase of Apple (NASDAQ AAPL) stock in Q1 was surprising for several reasons, but foremost may be because it violated Scalper1 News Scalper1 News Related posts: 5 Stocks Warren Buffett Would Never Buy The Advice From Warren Buffett That Bill Gates Ignored 3 Stocks Warren Buffett Probably Regrets Selling Investors’ Biggest Mistake: Home Bias