The Federal Reserve's preferred inflation measure is about to undergo a major statistical overhaul. As policymakers debate how to curb a new wave of price increases, this adjustment could relieve some pressure for rapid interest rate hikes.

Federal Reserve officials are set to meet this week to finalize interest rates, coinciding with the Bureau of Economic Analysis revising how it calculates price increases in certain sectors of the economy. The market expects this revision to lower recent readings on the Personal Consumption Expenditures price index.

Driven by the US-Iran conflict and the boom in the artificial intelligence industry, inflation has climbed rapidly, causing division among policymakers on how to respond. The overall PCE inflation rate rose to 4.1% in May, a three-year high, while the core PCE rate climbed to 3.4%, both significantly above the central bank's 2% target.

Economists estimate that the revised PCE calculation method will reduce the core inflation reading by about 0.2 percentage points, creating more room for the Fed to keep interest rates unchanged in the short term. Alan Detmeister, an economist at UBS and former Fed inflation researcher, said, "The inflation data moving closer to the Fed's target makes it easier for the Fed to choose not to raise rates."

Krishna Guha, a former New York Fed official and now chief economist at Evercore ISI, noted that as long as the market views the new statistical series as credible, a lower PCE reading would make it "easier for Fed Chair Kevin Warsh to avoid initiating a rate hike." This statistical adjustment comes as Fed officials are engaged in intense debate over whether and when to raise interest rates to combat inflation.

At least two members of the Federal Open Market Committee, which sets interest rates, have signaled they could vote for a rate hike as early as this week. At the same time, US President Donald Trump is applying significant political pressure on the Fed to cut rates. The current benchmark interest rate range remains at 3.5% to 3.75%.

Trump stated this week that while he believes Warsh wants to make the right decision on rates, some members of the Fed's Board of Governors are highly political and "perhaps ill-intentioned," tying Warsh's hands. The Bureau of Economic Analysis's statistical update will take effect in September, covering data on portfolio management fees, computer software and accessories, and legal services, and will retroactively revise historical data back to 2021.

Critics point out that although this adjustment is part of the BEA's regular revision process, the changes are concentrated on the very categories that are driving up inflation. At a time when monetary policy is under intense political scrutiny, this risks diluting the inflation reading. Detmeister said, "The official explanation does not fully clarify why these specific statistical sub-items were adjusted. The selection of adjustment targets seems to carry some political considerations."

The two categories of price statistics included in this revision—computer software and accessories, and portfolio management services—are among the five major drivers of rising inflation. Omair Sharif, an analyst at Inflation Insights, stated that while the adjustments themselves have a reasonable basis, "focusing on lowering a series of sub-items highly correlated with rising inflation... looks bad."

Some economists complain that the BEA has not fully disclosed the details of the adjustments, making it difficult for analysts to assess the actual impact on inflation readings. The BEA responded that the annual data revision is "carried out by the agency's senior professional staff to maintain the accuracy and reliability of statistical estimates," aiming to improve price measurement models.

Once completed, the PCE inflation gauge will further converge with the Consumer Price Index, a narrower measure of price pressures facing US households. Driven by a strong stock market, the PCE portfolio management services sub-item has surged in recent months, while the legal services sub-item previously relied on unpublished and highly volatile proxy data.

A recent research paper co-authored by former Fed governor Stephen Milan points out that software prices have seen unprecedented increases in recent months, and there is a "mismatch problem" in the current statistical framework for measuring software prices. Michael Pearce, chief US economist at Oxford Economics, said none of the items in the BEA's update appear "anomalous," and any measures to optimize inflation measurement are generally welcome. "It's hard to see what's wrong with these optimizations," he said, "statistical agencies continuously revise their accounting rules, incorporating optimizations and better data sources, which should increase our confidence in the data."

While the June PCE inflation data, due Thursday, is expected to decline, it will likely remain significantly above the Fed's target. In the long term, the BEA's statistical revision is expected to have a limited impact on the central bank's short-term policy decisions, as factors like the expansion of the AI industry will continue to push up core inflation. Robert Sockin, chief US economist at asset manager PGIM, said, "I don't think this will change the policy path. According to our forecast, as long as core PCE remains above 3% for the year, the Fed will choose to raise rates."