According to data published by the Census Bureau of the U.S. Department of Commerce, the average price of imported petroleum products averaged about $46 per barrel in 2017, or an increase of 27% above the previous year. Oil futures markets in April 2018 indicate that oil traders expected crude oil prices to trend at about $63 per barrel through the end of 2018, below actual market prices of close to $70 per barrel reached in early April 2018. Energy prices have fluctuated sharply over the past seven years, generally rising during the winter and spring months and then declining in the fall. In 2008, prior to the financial collapse, the average imported petroleum prices reached nearly $140 per barrel, before falling at a historic rate. During the economic recession in 2009, however, average petroleum prices fell each month between August 2008 and February 2009, but then reversed course and rose by 85% between February and December 2009, climbing to nearly $80 per barrel at times. In 2012, the average price of imported petroleum rose 1% over the same period in 2011 to reach an average price of $101.07 per barrel. In 2013, oil prices averaged around $97 per barrel, falling to an average monthly price of about $91 per barrel in 2014. Average imported petroleum prices dropped throughout 2015, falling to an average price of $37 per barrel in December 2015. Average imported petroleum prices rose through much of 2017 and into 2018, rising to close to $70 per barrel in early April 2018, outpacing oil futures contacts. Imported energy products, primarily crude oil, account for about one-fourth of the total annual U.S. energy consumption, measured in btus. Turmoil in the Middle East, natural disasters, hurricanes, droughts, the rate of economic growth in Asia and Europe, the prospects of Iranian oil exports, and the impact of low oil prices on U.S. investment and production of petroleum and natural gas—the United States is now the world's largest combined producer of oil and natural gas—likely will continue to have a significant impact on the course of oil prices for the foreseeable future. As a result of changing petroleum prices, imported energy-related petroleum products accounted for a larger share of the U.S. trade deficit in 2006-2008 and 2010-2011. Crude oil comprises the largest share by far within the broad category of energy-related imports. Despite fluctuations in oil prices and sharp drops at times in the average annual price of imported crude oil and the decline in the role of imported crude oil in the value of the U.S. trade deficit, the trade deficit itself did not change appreciably. Instead, the composition of the trade deficit changed, with non-petroleum products replacing petroleum products, as indicated in Figure 1 . In isolation from other events, lower energy prices tend to aid the U.S. economy by lowering energy costs for businesses, increasing consumers' real incomes, and making it a more attractive destination for foreign investment. Foreign capital inflows, however, place upward pressure on the dollar against a broad range of other currencies. Periods of volatility or uncertainty in the global economy also spur investors to seek out such safe currencies as the dollar, which tends to push up the international value of the dollar. To the extent that the additions to the merchandise trade deficit are returned to the U.S. economy as payment for additional U.S. exports or to acquire such assets as securities or U.S. businesses, the U.S. trade deficit could be mitigated further. Lower energy prices also are expected to aid consumers by increasing their real incomes and to aid some businesses. How consumers respond to lower energy costs, however, is problematic. In 2015, consumers reportedly responded to lower energy costs by slightly increasing their overall level of consumption and by increasing the saving rate and reducing credit card debt. In contrast, energy producers have responded to lower energy prices by curtailing new investments and by trimming payrolls, offsetting some of the stimulus to the economy provided by lower imported petroleum prices. Oil prices in 2013 averaged less than those in 2012; combined with a decline in the volume of imported oil, this resulted in a decline in the role of energy imports in the nation's trade deficit from 40% of the overall deficit in 2012 to 33% in 2013, as indicated in Figure 2 . By January 2018, energy imports had risen to account for about 9% of the total U.S. trade deficit from a share of 4% in December 2017, which stands at the lowest monthly share in over a decade. Summary data from the Census Bureau for the change in the volume, or quantity, of energy-related petroleum imports and the change in the price, or the value, of those imports for 2016 and 2017 are presented in Table 1 . The data indicate that during 2017, the United States imported about 3.63 billion barrels of energy-related petroleum products, valued at $174 billion, up 28% from $136 billion in 2016. On average, energy-related imports for 2017 were up 1.6% in volume terms from the average amount in 2016 and cost 27% more on average per barrel than similar imports during 2016. In general, U.S. demand for oil imports responds slowly to changes in oil prices. According to various studies, U.S. demand for oil is correlated more closely to U.S. per capita income than to changes in oil prices. Data for 2016 indicate that the United States imported 3.58 billion barrels of energy-related petroleum products, 5.0% more than was imported in 2015, valued at $136 billion. Most importantly, the average price per barrel of crude oil in 2016 was $36 per barrel, down 34% from the average price of $47 per barrel in 2015. At current prices and volumes, energy imports in 2018 are projected to rise to about $200 billion, or about $25 billion more than in 2017. Commerce Department data indicate that in 2017, the quantity of energy-related petroleum products imported by the United States increased by 1.6% compared with such imports in 2016; year over year, crude oil imports rose by 2.6%. As Figure 3 shows, imports of energy-related petroleum products can vary sharply at times on a monthly basis. In 2017, imports of energy-related petroleum products averaged about 303 million barrels per month, up 1.6% from the average of 298 million barrels per month in 2016. Through December 2017, average imports of crude oil, at 239 million barrels a month, were 2.8% above the same period in 2016. At 331 million barrels in January 2017 and 328 million average barrels per month in May 2017, imports of energy products reached their highest average monthly levels since 2013. As indicated in Table 2 , the nominal dollar value of energy-related imports in 2017 was $174 billion, up 28% from the value of energy imports in 2016, which accounted for about 8% of the value of total U.S. merchandise imports. In previous periods, energy prices have varied sharply, occasionally not following the general trend of falling during the winter months, as indicated in Figure 4 . As Table 2 shows, the average price of imported oil in 2017 was $46 a barrel, up 27% from an average price of $36 per barrel in 2016. In December 2017, the average price of imported oil stood at $52 per barrel. By January 2018, the average monthly price of an imported barrel of oil had risen to $55. Crude oil comprises the largest share of energy-related petroleum products imports. As is apparent from Census Bureau data, the price of imported crude oil has fluctuated sharply at times. For instance, from January 2008 to June 2008, the average price of crude oil increased by 39%, rising from $84 per barrel to $117 per barrel. As shown in Figure 5 , oil import prices varied in the general range of $90 and $108 per barrel between January 2012 and October 2014, after which imported oil prices have experienced a sharp drop. Crude oil prices rose from an average of $94 per barrel in January 2013 to $102 per barrel in September 2013, the highest average monthly value recorded up to that point in 2013, but fell to an average imported price of $91.34 in December 2013. In 2015, oil prices fell from $58.96 per barrel in January to $36.60 in December. During 2017, oil prices trended upward, rising from a monthly average of $43 per barrel to a monthly average $52 per barrel, the highest monthly average price since mid-2015. As previously indicated, the combination of changes in the volume, value, and prices of crude oil can have a large impact on the total value of U.S. imports and on the composition of the U.S. trade deficit. Figure 6 shows the annual amounts of the volume, value, and price of U.S. crude oil imports from 1973 to 2018, represented in index terms with 1990 as the base year. The data indicate that the overall volume of U.S. imports of crude oil increased by about 20% between 1990 and 2015 in index terms. The price of crude oil, represented by the average price of a barrel of crude oil on an annual basis, rose by about two and a half times between 1990 and 2015 in index terms. As a result, the total value of U.S. crude oil imports, representing the price per barrel times the number of barrels of crude oil on an annual basis, rose by about three times between 1990 and 2015 on an index number basis. The overall decline in the average price of energy-related imports has accompanied a drop in the imported volume of crude oil, potentially signaling important changes in the U.S. energy market. The United States has become the world's largest combined producer of oil and natural gas, which reduces the need for oil imports. In addition, improvements in energy efficiency appear to be continuing; such improvements result in less energy being used to sustain a given level of economic activity. A slower rate of economic growth also has consequences for energy consumption in the economy and the role of imported energy products. Lower energy prices, however, are not a panacea for the U.S. economy as a whole. The U.S. energy sector has trimmed employment and curtailed investment projects, which could pose problems for future energy production. Lower energy prices also are negatively affecting energy-exporting countries; this, in turn, negatively affects countries with which they engage in international trade. A slowdown in global trade will have a slightly negative impact on the U.S. economy: exports and imports account for about 13% and 16%, respectively, of U.S. GDP. The rise in the prices of energy imports in 2017 and early 2018, combined with a small increase in the total volume of energy imports, resulted in a larger contribution to the overall U.S. trade deficit in 2017 and 2018. The overall trade deficit, however, has stayed relatively flat. In previous periods, as energy imports declined, imports of non-energy goods increased. This trend is being reversed slightly with rising energy import prices. The average monthly price of imported oil continues to be volatile, making it difficult to determine when and at what level the price will stabilize in 2018. Oil futures markets seem to indicate a belief that the price will stabilize around $63 per barrel through 2018, although these contract prices are lagging behind market prices. The ubiquitous nature of oil in the economy generally means that changes in energy prices will affect the U.S. rate of inflation and the rate of economic growth. Various factors, dominated by events in the Middle East, a slowdown in the rate of economic growth in Asia and other developing economies, and an increase in natural gas production in the United States, combined in 2015 to push the cost of energy imports slightly lower than in 2014. The pace of economic growth in the United States tracked slightly above 3% in the second and third quarters of 2017, which may have affected both the level of oil imports and the price of such imports. The pace of economic growth has improved in Europe, Asia, and developing economies. Typically, energy import prices have followed a cyclical pattern as energy prices rise in the summer months and fall in the winter. The slowdown in the rate of economic growth in the United States and elsewhere in 2009 sharply reduced the demand for energy imports and caused oil prices to tumble from the heights they reached in July 2008. Two important factors that can affect crude oil prices are the impact Atlantic hurricanes have on the production of crude oil in the Gulf of Mexico and droughts in the midwestern United States that can reduce the production of corn and, therefore, the availability of ethanol, which puts upward pressure on gasoline prices. Recently, the price of oil has been affected by increased energy production in the United States and a combination of global economic events, including the slowdown in the Chinese economy; a sharp drop in commodity prices that has negatively affected commodity producers and their trading partners; the international exchange value of the dollar; an apparent agreement among OPEC oil producers to reduce production in order to drive up prices; and the prospects of a resumption of oil production in Iran, among other events. The return to a positive rate of economic growth in the United States and globally placed upward pressure on the prices of energy imports and contributed to the share of imported energy in the United States' merchandise trade deficit. Some of the impact of this deficit could be offset if some of the dollars that accrue abroad are returned to the U.S. economy through increased purchases of U.S. goods and services or through purchases of such other assets as corporate securities or acquisitions of U.S. businesses. Some of the return in dollars likely will come through sovereign wealth funds, or funds controlled and managed by foreign governments, as foreign exchange reserves boost the dollar holdings of such funds. Such investments likely will add to concerns about the national security implications of foreign acquisitions of U.S. firms, especially by foreign governments, and to concerns about the growing share of outstanding U.S. Treasury securities that is owned by foreigners. At times, slower-than-expected rates of economic growth in various regions of the world have reduced slightly the demand for oil and pushed down the average price of energy imports. Increased energy production in the United States also reduced the amount of energy imports, which may well have contributed to other forces that have tended at times to draw down the price of energy in world markets. Higher prices for energy imports may have been one contributing factor in spurring the economy to improve its energy efficiency, find alternative sources of energy, or search out additional supplies of energy. While lower energy costs should improve conditions for both producers and consumers, lower energy prices could dissuade energy producers from investing in new sources of energy, while the increase in consumers' real incomes from lower energy prices could either spur consumption, or could encourage consumers to use their extra income to increase saving and reduce debts. Congress, through its direct role in making economic policy and its oversight role over the Federal Reserve, could face the dilemma of a slower rate of economic growth, stagnant tax revenues, and falling prices. Traditionally, sluggish economic growth has been addressed through increased government spending and lowering interest rates to loosen credit and to stimulate investment. With the U.S. economy operating at full employment at the end of 2017, such stimulative measures may push up the rate of inflation. The impact on the U.S. merchandise trade deficit also is not straightforward. While lower imported energy prices reduce the energy component of the trade accounts, the overall value of exports and imports is determined by a number of factors, including the international exchange value of the dollar, the domestic balance of saving and investment, and relative rates of growth in demand for exports and imports. Consequently, while the energy component of the U.S. trade deficit has fallen appreciably, the overall U.S. trade deficit has not. If the rate of growth in the U.S. economy, even at low rates, outpaces that of its trading partners, the overall trade deficit potentially worsens even with lower energy prices due to a relatively stronger U.S. demand for imports than foreign demand for U.S. exports and an inflow of foreign capital that puts upward pressure on the value of the dollar. Under such circumstances, Congress potentially could face pressure to examine the causes of the trade deficit and to address the underlying domestic macroeconomic factors that are generating that deficit.

Summary: Imported petroleum prices fell from an average price of $91.23 per barrel of crude oil in 2014 to an average price of $32.60 per barrel in 2016, or a drop of more than 60%. This represents the lowest price per barrel of crude oil since early 2005. During 2017, the average monthly price per barrel of oil rose nearly 20% to reach an average of $52 per barrel by December 2017 and continued rising in 2018 to reach nearly $70 per barrel in early April 2018. Reflecting rising prices, the volume of crude oil imports for 2017 was nearly flat for the year compared with volume changes in 2016. The rise in the average price of a barrel of crude oil combined with a slight increase in the amount, or the volume, of oil imports in 2017 compared with 2016 resulted in a nearly 30% increase in the overall value of imported crude oil and a slight increase in the share of the total U.S. merchandise trade deficit that is associated with the trade deficit in energy imports. In general, market demand for oil remains highly resistant to changes in oil prices and reflects the unique nature of the demand for and the supply of energy-related imports. Turmoil in the Middle East is an important factor that continues to create uncertainty in global petroleum markets and was one of the most important factors in causing petroleum prices to rise sharply in early 2011 and in 2012. A slowdown in the rate of growth in the Chinese economy, combined with a rising in raw material prices, an increase in the rate of economic growth among commodity-exporting developing economies, and improved prospects of growth among many of the major developed economies, all have pushed up demand for energy products. Fluctuations in U.S. energy production, uncertainty concerning oil production decisions by various members of the Organization of the Petroleum Exporting Countries (OPEC), and the potential impact of new Iranian supplies of oil also have worked to push up the global market price of oil. Oil futures markets in April 2018 indicate that oil traders expect crude oil prices to trend in the range of $63 per barrel through 2018, below early April 2018 market prices. At current prices and volumes, energy imports in 2018 are projected to rise to about $200 billion, or about $25 billion more than in 2017. This report provides an estimate of the initial impact of the changing oil prices on the nation's merchandise trade balance.