Oil markets edged into positive territory on Friday as investors grappled with competing signals from the Middle East, where a freshly signed US-Iran agreement faced immediate strain due to cancelled diplomatic talks and escalating Israeli military activity against Hezbollah in Lebanon. The volatility underscores the fragility of energy market confidence when geopolitical risks remain unresolved, a dynamic that carries particular significance for Asian economies dependent on Gulf oil supplies and regional stability.

Brent crude futures climbed 51 cents to reach $80.36 per barrel, representing a gain of 0.64%, while US West Texas Intermediate crude advanced by $1.28, or 1.7%, to $77.88 per barrel. The active front-month July contract was approaching expiration on Monday, but the broader August WTI futures contract showed more meaningful strength, rising 59 cents to $76.44. Despite the Friday recovery, both major benchmarks remained on track for a weekly decline of roughly 8%, illustrating how recent developments have created sharp swings within the trading session.

The anticipated peace negotiations between Washington and Tehran were abruptly postponed when Vice President JD Vance cancelled his travel plans to Switzerland, leaving the diplomatic calendar empty and raising questions about the durability of the interim agreement signed by the two nations' leaders. This sudden shift from optimism to uncertainty has created an unusual dynamic in oil trading, where headline developments move faster than fundamental supply assessments can follow. Market analysts suggest that prices had stabilised at artificially low levels earlier in the week on assumptions that a stable truce would persist, but the collapse of face-to-face talks has forced traders to reconsider whether the agreement can withstand the pressures of ongoing regional conflict.

Vandana Hari, founder of Vanda Insights, a boutique oil market analysis firm, suggests that crude may have bottomed out at the week's lows and could now enter a renewed upward phase marked by significant price swings. Her assessment points to cracks already visible in the memorandum of understanding between Washington and Tehran, implying that market participants should remain cautious about assuming the accord will hold. The analyst specifically highlighted concerns about transit through the Strait of Hormuz, the critical chokepoint through which roughly one-fifth of global oil and liquefied natural gas supplies flowed before the conflict disrupted shipping patterns. Without confidence in normalised passage through these waters, the market lacks a fundamental reason to absorb the supply surge that a durable peace would unleash.

On Thursday, just hours after the presidents of Iran and the United States signed their interim accord, both crude benchmarks had touched their lowest levels since early March as three Saudi-flagged tankers carrying a combined 6 million barrels of crude transited the Strait of Hormuz. This tanker movement suggested that at least some market participants believed the agreement was genuine and that shipping could resume normal operations. However, the subsequent postponement of Switzerland talks has reversed that optimistic momentum, leaving traders uncertain whether other vessels will follow or whether this movement was merely opportunistic repositioning ahead of more sustained uncertainty.

The geopolitical backdrop has shifted dramatically as Israel maintained its military operations against Hezbollah in Lebanon despite the US-Iran peace announcement, a development that raises fundamental questions about whether the agreement encompasses regional proxy conflicts or merely addresses the direct US-Iran relationship. This distinction matters enormously for oil markets, because ongoing Israeli-Lebanese hostilities could destabilise the broader region and undermine the conditions necessary for normal commerce. Tim Waterer, chief market analyst at KCM, notes that traders remain cautious about committing to further price declines without hard evidence that tanker traffic through the Strait of Hormuz has actually returned to normal rhythms. This wait-and-see posture reflects rational market caution given the incomplete nature of the peace agreement and the persistence of kinetic conflict elsewhere in the region.

The potential supply implications of a lasting truce are substantial. Analysts estimate that the agreement could release more than 85 million barrels of crude currently stranded in Gulf storage facilities back into global markets, a volume equivalent to roughly one million barrels daily over three months. The accord also contemplates the lifting of US sanctions on Iranian oil exports, which would permit Tehran to return to international markets as a major supplier after years of embargo-related isolation. For countries like Malaysia that maintain diversified crude sourcing but remain vulnerable to regional energy disruptions, this prospect of returning Iranian supply represents both opportunity for price moderation and risk that any accord collapse could trigger sharp upward price corrections.

Producers throughout the region have already begun positioning themselves to restore normal operations. Kuwait Petroleum Corporation announced on Thursday that it had lifted all force majeure notices issued during the conflict, signalling management confidence that disruptions would ease. Similarly, Iraq's Oil Minister Basim Mohammed stated that the nation's oilfields stand ready to gradually resume production and return to pre-conflict output levels, suggesting that multiple producers expect normalisation to occur in coming months if the US-Iran deal endures. These statements indicate that at least some of the supply recovery anticipated by the agreement may materialise regardless of whether diplomatic relations continue to improve.

However, the persistence of Israeli military operations against Hezbollah in Lebanon creates a fundamental asymmetry in the geopolitical picture that no oil market analyst can confidently forecast. If Israeli-Lebanese hostilities escalate into a broader regional conflagration involving the US-Iran agreement partners, the crude market could face supply disruptions far more severe than those experienced during the initial conflict. Conversely, if Israel's operations remain contained and the US-Iran agreement holds despite ongoing proxy tensions, oil prices could face downward pressure from 85 million barrels of released supply entering a market where demand growth remains modest. For Malaysian policymakers and energy-dependent businesses, this uncertainty suggests that energy security planning should anticipate both scenarios while the diplomatic situation remains unresolved.