Oil benchmarks declined on June 19 as markets reacted to the initial resumption of tanker transits through the Strait of Hormuz following the signing of an interim peace pact between the United States and Iran. As of 0146 GMT, Brent crude futures were down 54 cents, or 0.68%, at $78.31 a barrel, while U.S. West Texas Intermediate slipped 46 cents, or 0.60%, to $76.14 a barrel.
The most immediate contract pressures are visible in the July front-month, which expires on Monday, while the more actively traded August contract was trading lower at $75.06 a barrel, down 79 cents.
Both benchmarks had fallen to levels not seen since early March on Thursday, a move that followed several tankers sailing through the strait. Among those vessels were three Saudi-flagged ships carrying a combined 6 million barrels of crude that transited the waterway hours after U.S. President Donald Trump signed a deal with Iran intended to end their war.
Analysts have quantified the potential supply impact of the U.S.-Iran agreement, expecting it to free more than 85 million barrels of oil that had been stranded in the Middle East Gulf and place that volume into global markets. The agreement also contemplates the lifting of U.S. sanctions on Iranian oil, which would further increase available supply.
Market participants remain cautious, however, seeking confirmation that shipments will continue at scale before adjusting positions further. In the words of KCM Chief Market Analyst Tim Waterer:
"Traders are still waiting for hard evidence that tanker traffic through the Strait of Hormuz is actually normalising before committing to the next leg lower. Until those ships start moving consistently again, scepticism lingers and keeps a lid on the downside."
Before the conflict, roughly one-fifth of the world’s oil and liquefied natural gas transited the Strait of Hormuz. Analysts now suggest that if the U.S.-Iran agreement endures, trade through the waterway could return to more normal levels in the coming months.
Producers in the Middle East are signalling readiness to restore exports. Kuwait Petroleum Corp said on Thursday that all force majeure notices issued during the war have been lifted with immediate effect. In Iraq, Oil Minister Basim Mohammed stated that the country’s oilfields are ready to resume production and that a return to normal output levels will take place gradually until previous production rates are restored.
Despite these signs of a re-emerging supply stream, regional instability has not been fully removed as a market variable. Israel has continued its war against Hezbollah in Lebanon, a factor cited as raising doubts about whether the U.S.-Iran peace agreement will hold over time.
For now, the market reaction reflects a balance between the prospect of a sizeable re-entry of Gulf barrels into global supply and ongoing uncertainty about whether tanker traffic and regional security can normalise consistently. Traders appear to be waiting for sustained evidence of resumed flows before committing to deeper price declines.