What had long been treated by investors as a tail risk has abruptly moved to the center of global market calculations after U.S.-Israel strikes killed Iran’s Supreme Leader, Ayatollah Ali Khamenei, triggering retaliatory attacks on Gulf cities and renewed instability across the region.
Airlines halted flights, and tankers carrying crude and refined products suspended transit through the Strait of Hormuz, a maritime chokepoint that handles a significant share of global oil shipments. As noted in a Reuters’ report, the immediate market concern is not only the prospect of sustained military escalation, but the political vacuum in Tehran and the potential fragmentation of authority within the Islamic Republic’s complex power structure.
The uncertainty surrounding succession, the ideological composition of the regime’s support base, and the entrenched influence of the Islamic Revolutionary Guard Corps complicate assessments of what follows. Investors now face the possibility of a prolonged regional conflict rather than a contained exchange.
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“Middle East tail risks have increased. Markets will reprice from geopolitical shock to regime risk shock, prolonged conflict, not just retaliation, unless Iran says it wants to negotiate,” Reuters quoted Rong Ren Goh, portfolio manager in the fixed income team at Eastspring Investments in Singapore, as saying.
The evolution from tactical retaliation to structural regime risk marks a shift in market psychology. During previous flare-ups, including last June’s “12-Day War” in Iran and repeated escalations in Ukraine, investors largely treated volatility as temporary. Analysts now warn that pattern recognition itself may be distorting pricing.
Barclays analysts noted that markets have historically sold geopolitical risk premiums once hostilities begin.
“History argues strongly in favor of selling geopolitical risk premium when hostilities start,” they wrote. “What worries us is that investors have now learned this pattern and might be underpricing a scenario where containment fails.”
Oil, inflation, and bond markets under strain
Energy markets are the most direct transmission channel. Brent crude has already risen roughly 20% this year to around $73 a barrel. The trajectory from here depends on whether Gulf oil flows are materially disrupted and how major producers respond.
William Jackson, chief emerging markets economist at Capital Economics, said a prolonged conflict that materially affects supply could push oil toward $100 per barrel. That, he estimates, could add 0.6 to 0.7 percentage points to global inflation — a development that would complicate central bank policy paths.
Higher oil prices would feed into transport, manufacturing, and food costs worldwide, with Europe potentially more exposed given its proximity to Hormuz-linked supply routes following the reduction of Russian energy flows. Tariq Dennison of Zurich-based GFM Asset Management said the inflation impact could be more pronounced in Europe than in the United States for that reason.
The bond market response is less straightforward. U.S. Treasuries and gold have attracted inflows this year as hedges against geopolitical stress and policy unpredictability under President Donald Trump. Gold is up 22% in 2026 after a record run in 2025, while the benchmark S&P 500 index is up just 0.5%.
Yet some fixed-income investors question whether Treasuries remain an unequivocal refuge. Goh pointed to the steady decline in U.S. 10-year yields, now below 4%, and questioned whether buying at those levels makes sense if oil-driven inflation resurfaces. A sustained energy shock could reprice inflation expectations upward and pressure long-duration bonds.
Safe havens tested, equities face repricing risk
Markets are expected to open with heightened volatility. Charles Myers, chairman of Signum Global Advisors, said prior to the strikes that markets were positioned for “a limited surgical strike,” not a decapitation of Iran’s leadership.
The distinction matters. A leadership vacuum introduces regime continuity risk, raising questions about internal factionalism, potential hardline consolidation, and the possibility of spillover across Lebanon, Iraq, Syria, and the Gulf.
Ed Yardeni of Yardeni Research offered a more tempered view, suggesting that any initial selloff in equities could reverse if investors conclude the conflict will be short-lived and oil prices stabilize. He also said gold could retrace gains and bond yields fall if markets begin to price in a post-war decline in energy costs.
Barclays, however, cautioned against buying an immediate dip, arguing that risk-reward dynamics remain unfavorable until the scale and duration of the conflict become clearer. The firm suggested a deeper correction — potentially exceeding 10% in the S&P 500 — might eventually create a more compelling entry point.
Beyond oil, analysts warn of fragilities elsewhere. Elevated valuations tied to the artificial intelligence boom and stress in private credit markets could amplify downside moves if liquidity tightens. In that scenario, geopolitical shock would act as a catalyst rather than the sole cause of repricing.
At the core of the market’s dilemma is a simple but unresolved question: whether the strikes mark the beginning of a contained confrontation or the start of a structural realignment in the Middle East’s political order. The answer will shape oil supply, inflation expectations, bond yields, and global risk appetite in the weeks ahead.