The escalation of the Iran conflict has reintroduced a familiar but potent macro risk: an energy-driven shock to the global economy. Oil markets sit at the centre of the transmission mechanism, with heightened tensions raising the probability of supply disruption through key routes such as the Strait of Hormuz, which handles a meaningful share of global crude flows. Even without a full physical disruption, risk premia alone have been sufficient to push prices higher, reflecting how tight spare capacity has become in the global system. While near-term volatility is expected, the key issue for markets is not the spike itself but the persistence of elevated pricing. A sustained move above $100/bbl begins to materially shift inflation expectations, policy trajectories and growth outcomes.
The macro transmission is well understood but remains powerful. Higher oil prices feed directly into fuel and energy costs and then into transport, food and broader production inputs, lifting headline inflation. This comes at a delicate point in the cycle, where central banks had been positioning for policy easing following the disinflation trend of the past year. A renewed energy shock risks interrupting that process, forcing policymakers to maintain a more cautious stance or delay rate cuts altogether. For developed markets such as the US, the impact is more nuanced with domestic energy production providing a partial buffer. Inflation expectations still remain sensitive to fuel prices, which are highly visible to consumers. In contrast, Europe and large parts of Asia are more directly exposed due to their reliance on imported energy, making the inflation pass-through both faster and more pronounced. At the same time, higher energy costs act as a de facto tax on consumers and businesses, compressing real incomes, reducing discretionary spending and weighing on margins. This creates a challenging macro mix where growth slows even as inflation proves sticky.
From a market perspective, the implications are layered but directionally consistent. Energy and resource sectors stand to benefit from higher realised prices and improved cash flows, while consumer-facing industries, transport and rate-sensitive segments come under pressure as cost bases rise and demand softens. Currency dynamics also come into focus, with oil-importing economies typically facing currency depreciation pressure as trade balances deteriorate, further amplifying imported inflation. For South Africa, our reliance on imported oil makes the transmission relatively direct. Higher global oil prices feed into fuel costs, which in turn lift transport and food prices, placing pressure on consumers and complicating the inflation outlook. This reduces the scope for monetary easing.
Ultimately, the key variable for investors is duration rather than direction. Markets are generally capable of absorbing short-lived shocks, particularly when underlying growth remains intact and policy flexibility is preserved. However, a prolonged period of elevated oil prices would have more structural implications, reinforcing a higher-for-longer rate environment and compressing global growth. In this sense, the Iran conflict is less an isolated geopolitical event and more a catalyst that has the potential to reprice a broad set of macro assumptions, chief among them the path of inflation, interest rates and global growth over the coming 12 to 18 months.