Understand relative value across different metrics and time periods. Kevin Warsh, President Donald Trump's nominee for Federal Reserve chair, has proposed shifting the central bank's inflation measurement strategy toward trimmed averages that exclude extreme price shocks. However, Bank of America economist Aditya Bhave cautioned that such a "regime change" may not deliver the results Warsh anticipates, potentially creating new challenges for monetary policy.
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- Warsh advocates for replacing the Fed’s current core PCE inflation measure with a "trimmed average" that excludes tail-risk price shocks, aiming to capture "underlying" inflation.
- The nominee described the shift as part of a broader "regime change" at the central bank, signaling potential alterations to the Fed’s policy framework.
- Bank of America economist Aditya Bhave cautioned that this approach may backfire, warning that removing extreme price movements could obscure important inflation signals and reduce the Fed’s policy effectiveness.
- The Fed has historically used core PCE to exclude volatile food and energy prices, but Warsh’s proposal would go further by eliminating all outlier price changes, including those from geopolitical events or supply disruptions.
- The debate highlights ongoing tensions over how to best measure inflation in an environment where supply-side shocks have become more frequent.
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Key Highlights
Kevin Warsh, the nominee to lead the Federal Reserve, told lawmakers during his Senate confirmation hearing that he favors changing how the central bank gauges inflation. Specifically, Warsh wants to move away from the traditional focus on core personal consumption expenditures (core PCE) — which excludes volatile food and energy prices — toward a "trimmed average" approach that strips out all tail-risk price movements.
"What I'm most interested in is: What's the underlying inflation rate? Not: What's the one-time change in prices because of a change in geopolitics or change in beef?" Warsh stated at his recent Senate hearing. "The measures I prefer are looking at things that are called trimmed averages," he added. "We take out all of the tail-risks, all of the outliers."
The proposal is part of what Warsh has described as a broader "regime change" for the central bank. However, Bank of America economist Aditya Bhave issued a warning this week, suggesting the reconfiguration might not pan out as Warsh hopes. Bhave argued that excluding extreme price shocks could obscure underlying inflation trends rather than clarify them, potentially complicating the Fed’s ability to make timely policy adjustments.
The Fed has long relied on core PCE as its preferred inflation gauge because it smooths out short-term volatility from energy and food. Warsh's trimmed average method would go further by also removing other outlier price changes, such as those caused by geopolitical events or supply shocks. Critics worry that such a narrow focus could cause the Fed to overlook important inflation signals, especially during periods of economic disruption.
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Expert Insights
Kevin Warsh's push to adopt a trimmed average inflation measure represents a significant potential shift in the Fed's operational framework. Proponents argue that stripping out extreme price movements could give policymakers a clearer view of persistent inflation trends, free from temporary disruptions such as geopolitical shocks or supply chain bottlenecks. However, critics, including Bank of America's Aditya Bhave, suggest that this approach might remove valuable data points that signal emerging inflationary pressures.
The outcome of such a change would likely depend on how the Fed defines "tail-risk" and which outliers are trimmed. If implemented too aggressively, the new measure could understate inflation during periods of widespread price volatility, potentially leading to policy missteps. Conversely, if the trimming is too narrow, the measure may not differ significantly from core PCE.
For markets, the credibility of any new inflation gauge would be paramount. The Fed’s current measures are widely followed by investors and influence expectations for interest rate decisions. A shift in methodology could initially create uncertainty, as market participants recalibrate their understanding of the Fed's reaction function. Warsh’s "regime change" rhetoric suggests broader changes to the Fed’s approach to monetary policy, which may require careful communication to avoid unsettling financial markets. Over time, the success of the trimmed average approach would hinge on its ability to provide accurate and timely signals that guide policy without introducing new biases.
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