Buffett buying tech at a premium with IBM By: MarketWatch November 14, 2011 at 14:49 PM EST Warren Buffet bought a pricey $10.7 billion stake in Big Blue, turning a blind eye to one of the most basic rules of investing: Buy low. Read More >> Related Stocks: American Express Berkshire Hathaway Berkshire Hathaway Coca-Cola Company Dollar General International Business Machines Macy's Procter & Gamble U.S. Bancorp Verisk Analytics Inc Wells Fargo