The strategy of buying a futures contract in a nearby time frame, then selling it just before that contract expires and replacing it by purchasing a more deferred contract at a lower price is a part of Trading Market Spreads 101.We read with interest and some bemusement one of the lead articles in the Money and Investing section of yesterday's Wall Street Journal (WSJ). It was entitled "Winning by Waiting in Commodities," and the author was Tatyana Shumsky. The article describes a strategy for profitable trading in commodity markets that, according to the author, has caused some fund managers to start investing in commodity markets once again after having deserted them in 2013 in favor of more attractive homes for their managed money. Basic...