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.

Contrary to typical FX reactions, hawkish ECB policy amid an energy shock would be profoundly negative for growth. Any rate hikes would compound the economic damage from higher energy prices, making the Euro more vulnerable.

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.

Markets pricing in ECB rate hikes after an energy shock is flawed. Higher energy prices are a negative growth impulse for Europe, hurting terms of trade and consumer spending. Hiking rates would only worsen the downturn, making European cyclicals and the Euro vulnerable regardless of policy.

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.

Despite inflationary pressures from an oil price shock, the US Federal Reserve is expected to maintain an easing bias. The rationale is that high energy prices will ultimately destroy consumer demand and weaken hiring, making rate cuts to support the economy more likely than hikes.

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.

Single-mandate central banks like the ECB and BoE are trapped. They must react to oil-driven inflation with hawkish policy, even though their economies are most exposed to the energy shock's demand destruction, creating a stagflationary double whammy.

An oil supply shock initially appears hawkishly inflationary, prompting central banks to hold or raise rates. However, once prices cross a critical threshold (e.g., >$100/barrel), it triggers severe demand destruction and recession, forcing a rapid policy reversal towards aggressive rate cuts.