Coca-Cola taught to stick with a truly wonderful business: Buffett

Warren Buffett recently spoke about Berkshire's investments in American Express and Coca-Cola. "Both companies tried expanding into unrelated areas over the years and both found little success," he said. "But each was hugely successful in its base business...The lesson from Coke and AMEX [is] when you find a truly wonderful business, stick with it. Patience pays," he added.