This commodities strategy can protect you from inflation, scarcity and even price declines - MarketWatch Deep Dive A dynamic commodities strategy can enhance an investment portfolio's returns over the long term. Photo: MarketWatch photo illustration/iStockphoto During conflicts that disrupt the flow of an important commodity such as crude oil, some investors will wish they had more exposure to commodities before the conflict began. But Kristof Gleich, the chief investment officer of Harbor Capital Advisors ...