Twelve countries are members of the Organization of Petroleum Countries (OPEC), the cartel that accounts for about 40% of global oil output and looms large when it comes to setting prices of the commodity.
Three OPEC member nations – Nigeria, Qatar and the United Arab Emirates – are represented in the world of exchange traded funds by three U.S.-listed, single-country funds. Not surprisingly, these ETFs have been punished as oil prices have plunged in recent weeks...............................................Full Article: Source
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