Fluctuations caused by other factors such as unexpected events. The two oil crises of the last century to the beginning of the outbreak in the early 1970s to the 1980s, the beginning of this century, the oil price short-term increased rapidly, and recently Iran nuclear crisis in the Middle East tens

Sudden events caused by other factors such as volatility. In the early 70s to early 1980s the two oil crises at the beginning of the century, oil prices in the short term as well as the recent rapid rise, the Iran nuclear crisis situation in the Middle East tensions that the price of oil will contin

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Emergency caused by other factors, such as fluctuations. Outbreak of the early early 70 's to the 80 's two oil crises, early short-term rapid rise in oil prices, and the recent Iran nuclear crisis triggered tension in the Middle East, oil prices continued in high, from the typical case is not diffi

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