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McGeever: The Fed's Warsh faces a problem with the 'wedge of rare US core inflation'

The gap between the two main measures of?underlying U.S. Inflation is growing. Kevin Warsh, newly confirmed Federal Reserve chair, is disappointed to find that the preferred measure of the central bank, which measures inflation, is the one with the fastest rise. This further dampens any hopes for rate reductions.

The Bureau of Economic Analysis released the April personal consumption expenditures figures on Thursday. This is one of two closely-watched price change measures across a broad range of goods and services. The consumer price index is another important measure of price changes.

On the back of rising energy prices, annual headline PCE inflation rose to 3.8% in March from 3.5%. Core inflation, which excludes volatile energy and food costs, increased to 3.3%, up from 3.2%. The numbers are in line with what was expected, but they still make Warsh uncomfortable.

The annual measures of headline PCE, CPI and core PCE inflation have been over 2% for five years. President Donald Trump's new tariffs on Iran and his war against the country are likely to push that number up to six years or more.

A wedge is emerging between the core PCE (which is currently at 3.3%) and CPI (2.8%). This is a rare phenomenon that will frustrate President Donald Trump who has been vocal about his desire for rates to be cut.

Two Inflation Measures: A Tale

PCE, on average, is broader than CPI, as it includes both urban and rural households. The PCE index includes expenses made by consumers such as employer's health insurance payments.

Core PCE rarely exceeded core CPI in the three decades leading up to the COVID-19 pandemic. Bank of America economists estimate that PCE only has topped CPI 11% of the times since 1990.

This relationship has changed in the last few months. AI may have been a major factor. Dean Maki (chief economist, hedge fund Point72) notes that the PCE core index has a greater weighting for computer software and accessories. This series has been rising at a rate of about?14 per cent annually, boosted by the AI capex spending this year.

Morgan Stanley's latest AI capex predictions for this year show a spending of $800 billion, an increase of 80% over the previous year. This will continue to put pressure on prices.

A second factor is the classification. The Cleveland Fed defines the core PCE index as including "food services", that is, food purchased for consumption off premises. Maki reports that the price of food away from home increased by 3.6% in April.

Maki recently wrote that "core PCE inflation appears to be even higher than target than core CPI and we believe this is likely going to continue in the months ahead."

He is not alone. According to the Philadelphia Fed's quarterly survey of professional economists, core PCE is forecasted to increase by 3.4% this quarter compared with a previous estimate of 2.7%. This represents a larger upward revision and higher inflation than core CPI forecasts.

SHIFT GOAL POSTS

It may be because of this that Warsh is open to considering other PCE measures. He has indicated that he prefers the "trimmed mean" indexes of the Dallas Fed and Cleveland Fed, which remove extreme price movements at the margins. This gives a better picture of the underlying changes in prices from one month to the next.

For many years, particularly during the Alan Greenspan Fed period in the 2000s it was assumed that annual core PCE was the benchmark for the Fed’s 2% target.

According to the Fed website, "the 2% target now is measured by the annual change in the price index of personal consumption expenditures." This suggests that policymakers are looking to headline PCE. However, confusingly, these two measures have been interchanged by Fed officials, economics, and market participants in recent years.

This ambiguity, on the other hand, could give the Fed some wiggle-room as it balances the Fed's interest in maintaining full employment and its focus upon price stability.

The lack of clarity may lead the markets to believe the Fed is simply shifting the goalposts, selecting the measure that best supports the desired policy shift.

This is a big risk at a time where questions are being raised about the independence of the Fed. Warsh's honeymoon may be over even before it has begun.

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(source: Reuters)