John Train wrote several books on investing, as well as columns for The Wall Street Journal, The New York Times and other publications. In the October 2 1978 issue of Forbes Magazine, he recounted a story sent in by a reader about a Mr Womack, a farmer who had never lost money in the stock market “following a technique which was the ultimate in simplicity” yet had resulted in some stocks making “long-term capital gains of 100%, 200% and even 500%”...