Monetary policy operates with a 12-18 month lag, whereas the inflationary effects of oil shocks are immediate and front-loaded. By the time interest rate changes impact the economy, the initial inflationary pressure from oil has passed, making a policy response ineffective and potentially harmful.

Central banks like the ECB have a single mandate for price stability, forcing them to hike rates in response to oil-driven inflation. The US Fed, with a dual mandate including employment, has historical precedent for "looking through" these temporary shocks, creating significant policy divergence between major economies.

The Federal Reserve's decision to keep rates unchanged provides a crucial, if unintentional, benefit to Emerging Markets. It limits pressure on EM central banks that would otherwise be forced to hike rates to defend weakening currencies against a backdrop of rising global interest rates, giving them more time to assess the shock.

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.

The Federal Reserve focuses on growth risks from an oil shock as the US services-based economy sees less impact on core inflation. In contrast, the European Central Bank is more likely to raise rates, prioritizing inflation control due to faster price pass-through in the euro area.

The market believes the Fed is more likely to ease on weak data than tighten on strong data. This perceived asymmetry in its reaction function effectively cuts off the 'negative tail risk' for global growth, making high-yielding emerging market carry trades a particularly favorable strategy in the current environment.

In a significant role reversal, emerging market central banks were more proactive and aggressive in tightening monetary policy to combat post-COVID inflation than developed market institutions. This action demonstrates a secular improvement in their credibility and sovereign credit quality.

Even if US inflation remains stubbornly high, the US dollar's potential to appreciate is capped by the Federal Reserve's asymmetric reaction function. The Fed is operating under a risk management framework where it is more inclined to ease on economic weakness than to react hawkishly to firm inflation, limiting terminal rate repricing.

The US economy's structure as an energy exporter, combined with the Federal Reserve's dual focus on both inflation and labor markets, means US yields react less dramatically to oil price spikes than European rates. This structural difference provides a relative buffer against energy-driven volatility.