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Oil Prices and the Value of the Dollar


April 12, 2016


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Oil prices, as measured by the spot price of West Texas
Intermediate (WTI), achieved a level of $107.95 per barrel
on June 20, 2014. By March 14, 2016, the price of the same
barrel of oil had sunk to $37.20 per barrel, a decline of over
65%. The fall in the price of oil was not continuous. After
the initial decline, oil prices seemed to have stabilized in
the $60 per barrel range from April 2015 through June
2015, but then began to decline again.

Figure I. Spot Price of West Texas Intermediate Oil,
2013-2016

  Dollars/barrel
  $120





  $ 40



            2013           2014          2015     2016

Source: Energy Information Administration, oil price data. Graphic
by CRS.

Many explanations have been given for the decline in oil
prices. On the market fundamentals side, weak economic
growth, almost worldwide, was credited with reducing
overall oil demand growth. On the supply side of the
market, rapid growth of U.S., and other, non-conventional
oil supplies, as well as increasing production in Iraq, were
creating a supply glut, resulting in record amounts of oil
held in storage. With respect to political/economic factors,
the Organization of the Petroleum Exporting Countries
(OPEC) declined to make production cuts that would limit
supply and potentially support prices. In addition, economic
sanctions against Iran appeared likely to be lifted,
potentially introducing even more oil supply into an already
over-supplied world market.


An additional factor affecting oil prices that received
analyst attention during the oil price decline was exchange
rates, or, in particular, the value of the U.S. dollar. The link
between the value of the dollar and the spot price of WTI is,
for many, one of the more opaque factors in oil pricing.

On the world oil market, oil is priced in U.S. dollars, and all
oil market transactions result in transfers of dollar balances.
As a result, the United States is, in effect, an indirect
participant in all world oil trades through the use of its
currency. This indirect participation occurs through the


mechanism of the exchange rate, the value of the U.S.
dollar compared to the values of other currencies
worldwide.

The U.S. dollar serves as a reserve currency for the world
economy. This means that most nations hold dollars to
facilitate international trade, as well as a way to hold
wealth. However, the dollar's value, computed as the
number of dollars it takes to purchase one unit of a foreign
currency, or a specified basket of currencies, varies almost
continuously, reflecting world economic conditions.
Currency values are reciprocal, in the sense that when the
U.S. dollar rises compared to, say, the Japanese yen, this is
equivalent to saying that the Japanese yen has fallen in
value compared to the U.S. dollar.

Figure 2. Value of the Dollar, 2013-2016

  Trade weighted exchange index
  120






  40



            2013         2014          2Q15       2016
Source: Federal Reserve Bank of St. Louis, exchange rate data.
Graphic by CRS.

The value of the dollar as measured against a trade-
weighted index of major currencies began increasing in July
of 2014 when the index measured 76.3729. By March of
2016 the index stood at 92.9248, representing an increase of
over 21 %. With respect to the time trend, it appears that the
value of the dollar began increasing soon after oil prices
began to fall in June of 2014, and continued to rise over the
period of declining oil prices, but by a percentage
magnitude of only approximately one third of that of the
change in oil prices. This pattern of oil price and exchange
rate data suggests that exchange rates, while not
precipitating the fall in oil prices, could be a factor in their
continuing decline.


The value of a nation's currency depends on a variety of
economic factors related to the world demand for the
currency and the supply of the currency on the world
currency market.

Economic factors important in exchange rate determination
include inflation rate differentials between countries,


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