S&P Global raises 2026 inflation forecasts and cuts growth outlook amid Middle East conflict

S&P Global Market Intelligence has revised its 2026 economic forecasts in a way that will concern anyone watching global markets. Inflation projections are going up. GDP growth estimates are coming down. The reason is the ongoing US-Israel-Iran war, which has introduced a new layer of risk into an already fragile global economy.

The firm's baseline scenario assumes energy disruptions will be short-lived, lasting only a few weeks. Under that assumption, Brent crude oil is expected to average around $90 per barrel in March before gradually pulling back. That is not a catastrophic number, but it is high enough to pressure inflation across import-dependent economies, particularly in Asia and Europe.

What S&P Global actually changed in its forecasts

S&P Global has not published a single blanket number. The revisions differ across regions, but the direction is consistent: lower growth, higher prices. Economies that rely heavily on oil imports are seeing the steepest inflation upgrades. Countries that had already been battling post-pandemic price pressures now face an additional commodity shock layered on top.

The firm describes uncertainty surrounding the conflict as very high. That is not boilerplate language. It means S&P is not confident even its revised baseline will hold. If the conflict extends beyond a few weeks or escalates further, the firm's downside scenarios show materially worse outcomes: higher sustained oil prices, supply chain disruptions affecting goods beyond energy, and a sharper contraction in business investment.

Why oil prices are the central variable here

The Middle East conflict matters to global forecasters primarily through one channel: oil. Iran is a significant producer, and any sustained disruption to its output or to shipping lanes in the Strait of Hormuz pushes energy prices higher almost immediately. The Strait handles roughly 20 percent of global oil trade. Even the threat of disruption tends to move futures markets before any physical supply is actually affected.

At $90 per barrel, fuel costs start feeding into transport, agriculture, and manufacturing costs within weeks. Central banks that had been signaling rate cuts in 2026 may now delay those decisions if inflation re-accelerates. The Federal Reserve has been particularly cautious about declaring victory on inflation, and an oil-driven price spike would give hawks on the committee fresh ammunition to hold rates steady.

GDP growth takes the hit across major economies

Higher energy costs act as a tax on consumption. When households spend more on fuel and electricity, discretionary spending falls. Businesses facing higher input costs either absorb the margin hit or pass it on to consumers, both of which slow economic activity. S&P's GDP downgrades for 2026 reflect exactly this mechanism playing out across the US, eurozone, and several major emerging markets.

Europe is particularly exposed. The continent has spent the last two years diversifying away from Russian energy, and that process is mostly complete. But it has not insulated European economies from Middle East supply shocks. Germany, which relies heavily on industrial output, is especially sensitive to energy cost increases. Any significant rise in oil and gas prices in early 2026 will show up in German industrial production data within a quarter.

How financial markets are responding

Bond markets have already begun pricing in the possibility that rate cuts will come later than expected. In equity markets, energy stocks have outperformed while consumer discretionary and growth-heavy sectors have pulled back. That rotation is a fairly textbook response to a stagflationary signal: slower growth paired with higher prices.

Currency markets are also reacting. The US dollar has strengthened modestly, which is typical during periods of geopolitical stress. A stronger dollar puts additional pressure on emerging market economies that carry dollar-denominated debt, since their repayment costs rise in local currency terms. This is one reason why S&P's downgrades are not limited to developed markets.

What the baseline scenario assumes and why it might not hold

S&P's baseline is built on a specific assumption: the energy disruption will last only a few weeks and Brent will average $90 in March before retreating. That is a relatively contained scenario. Conflicts involving Iran, however, have historically been difficult to time or contain. The 2019 attack on Saudi Aramco's Abqaiq facility briefly knocked out five percent of global oil supply. Markets recovered in weeks, but the shock was real.

A prolonged conflict or one that draws in additional regional actors could push oil well above $90. At $110 or $120 per barrel, the inflation and growth numbers S&P has published would need another round of revision. The firm's acknowledgment of very high uncertainty is, in effect, a warning that its own baseline carries a wide margin of error.

For now, investors and policymakers are watching two things closely: how long the conflict lasts and whether the Strait of Hormuz remains open to commercial shipping. Those two variables will determine whether the 2026 forecasts hold or whether the next set of revisions arrives sooner than expected.