Global crude markets moved higher on Friday as investors reassessed the durability of a tentative ceasefire between Washington and Tehran, with negotiations abruptly postponed and fresh conflict eruptions undermining confidence in the arrangement. By early European trading, Brent crude climbed 51 cents to settle at $80.36 per barrel, representing a 0.64% advance, while West Texas Intermediate rose $1.28 to $77.88, a 1.7% jump that reflected renewed caution among traders. The strength came despite both benchmarks posting weekly losses of roughly 8%, indicating that Friday's recovery only partially reversed substantial earlier declines triggered by initial optimism about Middle Eastern supply normalisation.

Switzerland announced the cancellation of planned talks between American negotiators and Iranian counterparts scheduled for Friday, with U.S. Vice President JD Vance withdrawing from the engagement, a move that injected fresh uncertainty into market calculations. The disruption arrived just days after Tehran and Washington had signed an interim accord intended to resolve their prolonged dispute, yet the rapid deterioration in diplomatic momentum suggested the agreement remained fragile and subject to reversal. Vandana Hari, founder of Vanda Insights, observed that oil prices may have stabilised at lower levels but cautioned that emerging fissures within the underlying memorandum of understanding would likely trigger renewed volatility as traders struggle to assess the deal's credibility.

The cancelled negotiations underscored broader concerns about whether the ceasefire could withstand mounting geopolitical pressures, particularly the intensification of Israeli military operations against Hezbollah across Lebanon. Hari noted that sustained Strait of Hormuz transits remained the crucial confidence indicator, and traders remained sceptical about committing capital to further price declines without tangible evidence that shipping patterns were genuinely normalising. The waterway carries approximately one-fifth of global crude and liquefied natural gas flows, making its security fundamental to international energy markets.

Initial enthusiasm for the accord had triggered a sharp sell-off, with both crude benchmarks reaching their lowest points since early March when three Saudi-flagged tankers carrying 6 million barrels transited the strait within hours of the presidential agreement announcement. Market participants had anticipated substantial crude releases, with analysts estimating that more than 85 million barrels of petroleum stranded in Middle Eastern Gulf facilities could flow into international markets following the pact. Additionally, the lifting of American sanctions targeting Iranian oil exports promised to expand global supply meaningfully, creating expectations of sustained downward price pressure.

Middle Eastern producers began taking concrete steps to rebuild output following years of disruption. Kuwait Petroleum Corporation lifted all force majeure declarations it had issued during the conflict, signalling operational readiness to restore crude shipments. Iraq's petroleum ministry indicated that oilfields stood prepared to resume normal production, with Oil Minister Basim Mohammed confirming that output would gradually return to previously established levels. These developments suggested that once diplomatic stability materialised, the region possessed immediate capacity to substantially expand supplies.

Yet the resumption of hostilities between Israel and Hezbollah injected profound uncertainty into these calculations. Tim Waterer, chief market analyst at KCM, noted that traders required concrete evidence of genuine normalisation in Hormuz transit flows before committing to substantial further price reductions. The hesitation reflected reasonable caution about premature commitment to scenarios that might collapse if broader Middle Eastern tensions escalated unexpectedly. The potential unravelling of the US-Iran accord would eliminate the principal driver of anticipated supply growth and rapidly reverse the supply-side optimism underlying the week's dramatic price declines.

For Malaysian and Southeast Asian energy-importing economies, the volatility carries significant implications. Regional refineries and power generators had begun adjusting purchasing strategies based on assumptions of lower crude prices and expanded availability, yet the diplomatic setback and military escalation now introduce planning uncertainty. Malaysian refiners, among the region's largest, face complicated inventory decisions as price signals remain contradictory, with geopolitical risk premiums potentially offsetting fundamental supply-demand dynamics.

The broader pattern reflects an uncomfortable reality in global energy markets: even preliminary agreements between major antagonists can deteriorate rapidly when underlying tensions remain unresolved. The US-Iran accord appears to have addressed immediate bilateral hostilities but failed to encompass the constellation of proxy conflicts and regional rivalries that destabilise Middle Eastern security architecture. Israel's continued military operations against Hezbollah represent precisely such a complication—a conflict tangential to the central American-Iranian relationship yet capable of triggering broader regional escalation that would render the primary agreement obsolete.

Market participants must therefore navigate conflicting signals: structural supply factors point toward lower sustained prices as Middle Eastern production normalises, yet geopolitical risk remains acute given unresolved conflicts threatening the diplomatic foundation underlying anticipated supply expansions. The cancellation of the planned talks and postponement of confidence-building engagement between American and Iranian negotiators suggests momentum has shifted toward renewed confrontation rather than stable coexistence. Without rapid de-escalation of the Israel-Lebanon conflict and resumption of substantive diplomatic engagement, market participants will likely remain reluctant to embrace the supply-driven price trajectory that emerged briefly when the accord was announced.