Inflation Continues to Cool

SUMMARY

  • Falling oil prices are a moderating influence on inflation, reducing ‘Stagflation’ risk.
  • This is positive for US stocks. However, low oil prices are a negative for the energy sector, in our view.
  • Tariff uncertainty delays Fed action.

The April Consumer Price Index (‘CPI’) report was released last Wednesday and gave the Federal Reserve another positive data point in its inflation fight, as did Thursday’s negative Producer Price Index (‘PPI’). Headline CPI fell for the fourth consecutive month and is trending towards the Fed’s stated, long-term inflation target of 2% (see chart 1, below). While consumer prices are unlikely to have been affected much by tariff policy yet, it appears from parsing PPI that companies are trying to shield consumers from large price increases. Regardless, we still view this as a positive sign, given the concern surrounding those tariffs and their effects on inflation. We have spilled much ink over the last several weeks discussing tariffs and instead would like to focus on oil prices and their impact on inflation. Oil prices are particularly interesting since they tend to be both a direct and indirect driver of inflation… meaning they impact core CPI and other indicators that the Fed is watching, even when oil prices are explicitly removed.

Inflation and Oil Prices: Closely Correlated

One of the major reasons we believe we have seen a continued downward trend in CPI is lower oil prices. In fact, looking at Chart 1 (below) we can see the relationship between West Texas Intermediate (WTI) oil prices (left axis) and CPI (right axis).
Chart 1: Oil Prices

This chart illustrates a strong relationship between the price of oil at the beginning of the month and the eventual CPI print for that month and shows the two data sets have a high correlation of roughly 0.8. As stated above, oil prices, as an input of CPI, directly drive inflation, but energy only makes up 7% of the CPI basket. Therefore, there must be second order effects present that cause the correlation between oil prices and CPI. Additionally, the correlation between CPI ex-Food and Energy (‘Core CPI’) is equally robust. As its name suggests, core CPI removes price changes in energy, so any correlation between oil prices and core CPI must come from second order effects.

Last month, the Organization of the Petroleum Exporting Countries (‘OPEC’) announced an increase in their output that, along with concerns about the global economy, sent WTI prices below $60 per barrel. While they have recovered to the low $60’s in the past couple of weeks, we believe the leading relationship between oil and CPI implies that May should provide further relief on the inflation front.