Iran Conflict at 100 Days Forces Fed and BOE to Hold Rates as Oil and Growth Risks Offset

US and UK central banks left benchmark rates at 4.25-4.5 percent and 5.0 percent respectively in their June 2026 decisions. Minutes and statements recorded explicit reference to energy-price volatility and shipping-cost increases tied to Strait of Hormuz activity since early March. Both institutions noted that core inflation measures had not yet incorporated the full second-round effects visible in futures curves for Brent and Dubai crude.

Oil benchmarks traded 18 percent higher than pre-conflict levels, adding an estimated 0.6 percentage points to US headline CPI and 0.8 points to UK CPI over the next two quarters according to internal staff models. At the same time, forward-looking indicators showed softening manufacturing PMI readings in Europe and East Asia, reflecting higher input costs and reduced export orders. The documented divergence between immediate cost-push inflation and medium-term demand destruction left both committees unwilling to adjust the policy stance.

The feedback loop operates through two channels. Higher energy prices transmit directly into inflation expectations, documented in the Fed’s own Survey of Consumer Expectations and the BoE’s Inflation Attitudes Survey. Simultaneously, elevated uncertainty reduces capital expenditure, visible in declining orders for capital goods and widening credit spreads on emerging-market sovereign debt. Neither effect has yet dominated the other in the data.

Next meetings in July will hinge on whether monthly CPI prints exceed or fall short of 0.4 percent month-on-month core and whether Brent sustains above $90 for more than ten trading sessions. Absent a decisive break in either direction, both banks are expected to maintain the current pause.