Morgan Stanley economists, including Seth Carpenter, say the central risk for global investors is not a renewed run-up in oil prices but the prospect that elevated prices persist. The team laid out a scenario in which tensions around the Strait of Hormuz ease but stop short of a full resolution, leaving oil flows partially constrained and markets pricing in what they call "a sustained geopolitical premium indefinitely."
In that environment, the familiar mechanics that capped the economic fallout from earlier oil shocks would not apply. Historically, sharp increases in oil prices have tended to reverse, limiting the duration of inflationary pressure. Under the scenario the economists describe, however, mean reversion would be limited or absent, producing a prolonged cost shock that companies would find increasingly difficult to absorb through margins.
"Inflation risks therefore remain skewed to the upside even as headline prints improve," the economists wrote.
On the growth outlook, Morgan Stanley does not anticipate a global recession. Instead, persistently high energy costs would act as a sustained drag on household consumption and corporate profitability across both developed and emerging markets. The economists say the slowdown would likely be gradual in taking effect but would be meaningful once it materializes. Because the scenario does not, in their view, trigger a worldwide contraction, second-round effects from higher prices would outweigh any disinflationary impulses stemming from slower growth.
"The shock is therefore stagflationary in direction, and policy will nudge one side or the other," they added.
How policymakers respond is expected to vary sharply by jurisdiction. Institutions with acute sensitivity to inflation expectations - the European Central Bank and the Bank of England, in the economists' assessment - would have incentives to tighten policy further. By contrast, the Federal Reserve is judged more likely to pause. Morgan Stanley expects the Fed to rule out near-term rate cuts while signaling a willingness to keep policy restrictive well into 2027, particularly if inflation expectations show signs of drifting.
Fiscal policy divergence is where the implications become particularly consequential, the economists argue. Broad price suppression measures - such as fuel tax reductions, price caps, or general subsidies - shift the immediate burden from households to public balance sheets. While such measures provide short-term relief, they blunt market price signals, sustain demand, and risk keeping inflation elevated.
Energy-importing emerging markets with limited fiscal room face the sharpest trade-offs between cushioning consumers and preserving fiscal stability. By contrast, energy-exporting countries would generally see improved terms of trade and, in some cases, a rise in fiscal revenues.
Ultimately, the economists conclude that the persistence of the shock matters as much as its peak. Broad, untargeted energy support could prolong inflation and force monetary authorities into tighter policy stances. Narrower, targeted support that allows prices to pass through to end users would likely result in weaker growth but leave inflation more contained.
Implications for markets and sectors:
- Energy and commodities markets would be subject to a sustained risk premium as a result of partial flow restrictions.
- Consumer spending and corporate margins in both developed and emerging markets would face pressure from prolonged higher energy costs.
- Financial markets would need to price in divergent central bank paths and the fiscal capacity of different countries to respond.