Kevin Warsh gave his preferred way for measuring inflation. It could come back to bite him

Warsh is proposing a new Fed inflation framework centered on trimmed averages rather than the core PCE measure, which was 3.0% versus Bank of America's trimmed-mean estimate of 2.3% and trimmed-median estimate of 2.8% as of February. BofA warns the change could paradoxically make food and energy shocks matter more in policy readings and at times produce a more hawkish inflation signal, as it did in 2019-2020. The debate matters for Fed credibility and the outlook for interest-rate policy, while also carrying political overtones given Warsh's ties to Trump.

Analysis

A regime shift in the inflation lens is not mechanically dovish; in the near term it can actually make policy more path-dependent and more volatile. If the Fed starts emphasizing trimmed metrics, the market will have to trade a second derivative: not just headline disinflation, but whether residual food/energy noise migrates into the trimmed basket and keeps the ‘underlying’ print sticky. That creates a higher probability of policy confusion around every CPI/PCE release, which is typically bearish for long-duration assets because the market prices less certainty, not just a lower rate path.

The subtle loser is the front-end rally thesis. If trimmed inflation can run above core during commodity bursts, a Warsh Fed would be forced to defend its own framework by staying tighter than the market expects, especially if political optics make it harder to pivot quickly. That would favor banks and short-duration financials over housing, unprofitable tech, and levered small caps; the banks benefit not only from wider timing uncertainty but also from a potentially steeper carry profile if real rates stay elevated longer.

The key contrarian point is that this is not an automatically more dovish methodology; it may be more hawkish in volatile supply regimes and more restrictive on average than the market assumes. Investors are likely underestimating the risk that the Fed, once committed to a trimmed measure, loses freedom to ‘look through’ commodity noise because doing so would appear selective. The result is a credibility trap: in inflation downshifts, policy can ease less than expected; in inflation spikes, it can tighten more than expected.

Near-term catalyst risk is highest around the next few inflation prints and any hearing/Fed commentary that anchors the new framework. Over 3-6 months, the market may reprice the entire rates complex if traders conclude the new regime reduces the odds of a clean cutting cycle. That would pressure duration-sensitive sectors and support value/financials, but the trade is vulnerable if incoming inflation data continue to trend cleanly lower without commodity contamination.

Key Decisions for Investors

• Long BAC / short IWM for 1-3 months: banks should outperform smaller, rate-sensitive domestics if the market reprices fewer or later cuts; target 8-12% relative outperformance, stop if 2 consecutive inflation prints soften enough to re-ignite a clean easing narrative.
• Buy puts on TLT or short IEF into the next CPI/PCE window: trimmed-metric rhetoric increases the odds of sticky front-end yields and a lower duration premium; attractive if real yields back up 20-30 bps on any commodity-driven inflation surprise.
• Long XLF vs short XLRE over 2-4 months: a regime that tolerates less policy easing than consensus compresses REIT multiples and supports financials via higher-for-longer rates; look for 5-7% spread widening if the Fed leans on trimmed inflation as its anchor.
• If trading options, own upside skew in rates vol via payer spreads on SOFR futures or short-dated calls on 2Y yield into the next two inflation releases; this is a volatility regime trade, not a clean directional bet, with favorable convexity if the Fed reaction function becomes less predictable.