A spike in oil prices could keep CPI inflation above 3%. In this environment, the Fed cannot cut rates to support a weakening economy, as doing so would spook bond traders, risk higher long-term rates, and make financial conditions even tighter, effectively taking them 'off the table.'

Historical precedent is unequivocal: central banks do not cut interest rates in response to an oil shock. Despite the negative growth impact, their primary concern is preventing the initial price spike from embedding into long-term inflation expectations. Market hopes for easing are contrary to all historical data.

A more aggressive Federal Reserve reaction function is interpreted as a tightening signal by inflation markets. This leads to lower inflation break-evens and higher real yields, a counter-intuitive move compared to when the Fed and markets react in tandem to strong economic data.

The Fed won't immediately "look through" energy inflation. It must first confirm that tariff-related inflation has passed. Only then will it decide whether to ignore a supply-side energy shock. This multi-layered process raises the bar for easing and pushes rate cuts later into the year.

The long end of the bond curve has moved up simply to reflect tighter short-term policy, but has not seen a meaningful expansion of risk premiums. This suggests the market is complacent, underestimating the risk that this oil shock could extend the period of above-target inflation for years, similar to the post-2022 experience.

A hawkish Fed raises real US yields while lower oil prices reduce inflation expectations (break-evens). This specific combination has historically been the most damaging environment for emerging market fixed income assets, creating a dual headwind for investors.

While equities had a mixed reaction to inflation data, the bond market shows clearer concern. FedWatch data reveals a significant shift in expectations over the past month, with the probability of a 25 basis point rate hike by year-end rising to 30%, while the probability of a cut has diminished.

Policymakers, scarred by post-COVID inflation, risk tightening monetary policy excessively in response to energy price surges. History suggests these shocks are temporary and primarily affect headline, not core, inflation. The greater danger is stifling economic growth by overreacting to a transient inflationary impulse.

The knee-jerk reaction to a geopolitical shock is often a bond market rally (flight to safety). However, if the shock impacts supply (e.g., oil), the market can quickly reverse. It pivots from pricing geopolitical risk to pricing the risk of persistent inflation, forcing yields higher in anticipation of rate hikes.