As the economy expands and inflation ticks up, investors will have to keep in mind the negative effects of rising prices and maybe look to hard-asset related investments and exchange traded funds to help maintain the purchasing power of their portfolios. "Exposure to natural resources/commodities offers the potential advantage of offsetting some of the longer-term… Click to read more at ETFtrends.com. This article was provided by our partner Tom Lydon of etftrends.com.