| An investment fund traded on the stock exchange is called an exchange-traded fund (or ETF). An ETF holds assets like commodities, stocks, and bonds. It trades like a stock. Most ETFs track a bond index or stock index. The oil ETF consists of oil company stocks or futures contracts for various oils, gases, and petroleum-based fuels.
The massive decline in crude oil prices in the second half of 2014 has led to collateral damage for key oil ETFs. Most oil ETFs are down and trading at discounts...............................................Full Article: Source
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