Posts filed under “Energy”

The Effect of Oil Price Declines on Consumer Prices

The Effect of Oil Price Declines on Consumer Prices
Ben Craig and Sara Millington
11.19.14

 

 

 

Oil prices have declined significantly in recent weeks, reaching levels not seen in several years.  At the same time, the year-over-year percent change in the most widely known measure of inflation, the Consumer Price Index (CPI), came in at 1.7 percent for September, which is below policymakers’ targeted levels. Given these circumstances, there is some concern that low oil prices, which have continued to remain below $90 a barrel through October, will keep inflation persistently below or even push it further from targeted levels. A look at historical relationships between oil prices and various price measures can help gauge the potential pass-through of the recent oil-price declines to other domestic prices.

Historically, international and domestic oil prices have moved closely together—until recently there had been 25 years of nearly identical price movement. (Brent crude is the measure of international oil prices, while West Texas intermediate is the measure of domestic oil prices.) However, at the start of 2011 they began to deviate slightly from one another. In October, oil prices fell significantly, resulting in some of the lowest international barrel prices since 2010, and the two crude benchmarks began to converge to the same price path.

The most direct impact that low oil prices, both domestic and international, have on other domestic prices is through a decline in retail gasoline prices.  While oil prices and gasoline prices follow the same trend, gasoline prices react with a delay to changes in oil prices. Gasoline prices have been trending around $3.50 a gallon for a few years, a level much higher than before the recession, but by the end of October, they had declined to $3.14 a gallon.

 

In broader terms, one way in which we might expect oil prices to influence aggregate domestic prices is by lowering firms’ costs of production.  An indicator in which this effect would show up is the Producer Price Index (PPI), which measures the change in the selling prices received by domestic producers for their output. As production costs go down, firms can lower the prices they charge for their produced goods. The year-over-year percent change in the PPI for finished goods has been loosely related to international oil prices for the past 20 years. But when oil reached $60 a barrel in 2007, the two price series began to move more in sync. The year-over-year percent change in the PPI was lower in the most recent data release, but it is still too early to tell whether low oil prices are going to feed through to the PPI going forward.

Given that oil prices and gasoline prices move closely together, low oil prices will directly affect the CPI through its energy component. The close comovement of the CPI energy index and oil prices can be seen below.  However, much like the PPI, the energy CPI began to trend much closer to oil prices following the $60 threshold of 2007.

Since the CPI is most directly influenced by oil price changes through its energy component, one question that remains is whether or not other components in the CPI are influenced by low oil prices.  Generally, energy prices are rather volatile, and so energy components are often excluded when predicting inflation because of that volatility.  Forecasters focus on “core” measures instead.  The recent decline in oil prices is of less concern to many CPI forecasters, because it may not affect the “core” price level.  It would be a bit more concerning, however, if low oil prices also affected other domestic prices as well.  A quick look at the year-over-year percent changes in the energy CPI and the CPI excluding energy suggests changes in energy prices are often followed by similar changes in the rest of the CPI’s components.

We can take a more detailed look at how changes in energy prices might affect the nonenergy parts of the CPI by looking at the correlation between the CPI energy index and the indexes for other CPI components. The resulting correlations point to two components that are significantly correlated to energy price swings—food and beverages and housing—though the strength of these relationships has fluctuated over time. However, the relationship between energy and other components of the CPI is weak and, in some cases, even negative. Looking at the “all-items” or “headline” CPI suggests that the relationship between it and the energy index is strong, but this, again, is primarily because the energy component exerts such a strong influence in the overall CPI. It does explain why changes in energy prices can substantially change the headline CPI numbers.

Correlations between the CPI Energy Index and Other CPI Component Indexes

 

Component Index
1970-1980
1980-1990
1990-2000 2000-2010 2010-present
Total
All items 0.833 0.895 0.895 0.931 0.771 0.681
All items less energy 0.726 0.781 0.400 0.157 −0.117 0.442
Food and beverages 0.555 0.653 0.499 0.087 0.259 0.425
Housing 0.739 0.806 0.478 0.607 −0.474 0.555
Apparel 0.629 0.777 0.183 −0.047 0.039 0.293
Medical care 0.409 0.464 0.290 0.298 0.216 0.259
Recreation −0.017 −0.465 −0.155
Education and communication −0.360 −0.129 −0.222
Other goods and services 0.438 0.341 0.114 −0.413 0.265 0.034

Note: Correlations are between the year-over-year percent changes in each index.
Sources: Bureau of Labor Statistics; Haver Analytics.The volatile nature of oil and energy prices more generally makes it difficult to say how recent oil price movements impact the longer-term outlook for inflation.  However, we can gauge the impact that these oil price changes have on the near-term inflation outlook. The Federal Reserve Bank of Cleveland’s inflation nowcasting model provides a daily nowcast of inflation for both the PCE and CPI. The nowcast provides a forecast of the current period’s rate of inflation before the official data are released. If we plot recent gas prices along with the daily nowcasts for the CPI, PCE, core CPI, and core PCE, we see that declining oil prices decrease nowcasts for headline CPI and headline PCE, while the core indicators remain steady. Headline CPI and PCE both continue trending downward as gasoline prices continue falling. Core measures, being isolated from direct energy swings, remain around 1.5 percent.

Oil price changes can potentially play a large role in the US economy.  With respect to inflation, the two most likely channels through which they could do so are retail gasoline prices and producer prices. However, as consumers use savings from lower energy prices for other goods and services, these prices are likely to rise in response, offsetting the initial disinflationary impact of lower oil prices. Accordingly, as the FOMC observed in its Statement on Longer-Run Goals and Monetary Policy Strategy, “the inflation rate over the longer run is primarily determined by monetary policy,” rather than by movements in individual price components.

Category: Consumer Spending, Energy, Think Tank

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