Iran buried slain leader Hassan Rouhani in a state ceremony on Wednesday, marking an escalation of regional tensions that rattled global energy markets and lifted safe-haven assets.

The funeral came as the country's successor remained out of public view, deepening uncertainty over Iran's next political direction and response to the assassination. Oil prices spiked immediately following news of Rouhani's death, with WTI crude climbing above $85 per barrel as traders priced in the risk of Iranian retaliation against Israel or broader Middle Eastern conflict.

Gold, traditionally favored during geopolitical crises, surged to multi-month highs as investors fled riskier assets. The U.S. dollar strengthened against emerging market currencies, particularly the Israeli shekel and the Iranian rial, reflecting flight-to-safety positioning across portfolio managers.

Stock markets in the region experienced sharp sell-offs. The Tel Aviv Stock Exchange fell 3.2 percent, while broader emerging market equity indices dropped as institutional investors reduced exposure to geopolitically sensitive holdings. U.S. equity futures declined slightly overnight on the news, though major indices like the S&P 500 and Nasdaq opened mixed the following morning as analysts debated the severity of escalation risk.

Credit markets priced in elevated tension. The yield spread between U.S. Treasuries and high-yield corporate bonds widened as investors demanded higher compensation for risk. Ten-year Treasury yields fell to 3.85 percent as fixed-income traders rotated into government bonds ahead of potential military action.

The assassination removes a key moderate voice from Iranian politics. Rouhani's successor has not yet appeared publicly, leaving markets to guess at whether Iran will pursue diplomatic channels or military escalation. This vacuum creates additional uncertainty for investors holding Middle Eastern exposure or energy sector positions.

Regional banks with Iran exposure fell sharply on Wednesday, particularly those with Iranian client bases or trade finance exposure. Insurance companies offering war risk coverage saw premiums spike within hours of the news.

Energy traders now watch for any Iranian military response or statements from the new leadership. A swift diplomatic intervention could ease oil markets back below $80 per barrel. Any military action or blockade threat would likely push WTI significantly higher and trigger broader equity market volatility across developed and developing economies.

Investors should monitor WTI crude oil futures, the S&P 500, the Tel Aviv Stock Exchange, 10-year Treasury yields, and VIX volatility levels for signs of de-escalation or further conflict.