Market movement
Oil prices fell on Wednesday, extending a three-day decline as market participants reacted to growing optimism that an interim arrangement between the United States and Iran could be reached to re-establish shipping through the Strait of Hormuz. At 20:54 ET (00:54 GMT), October Brent futures were down 0.3% at $79.12 per barrel, while September West Texas Intermediate futures slipped 0.5% to $75.39 per barrel.
Both benchmarks had already suffered steeper losses earlier in the week, tumbling by more than 5% on Tuesday and adding to sharp declines recorded on Monday.
Diplomatic developments
Diplomatic activity centered on an interim proposal reportedly drafted by Qatar as mediators sought to bridge differences between Washington and Tehran. The aim of the proposal is to restore navigation through the Strait of Hormuz, a channel that normally carries about one-fifth of global oil and liquefied natural gas shipments.
The diplomatic push followed comments by the U.S. President that talks with Iran had begun and a suggestion that Iran faced a "last chance" to reach an agreement. Qatar's government said the U.S. President discussed de-escalation efforts with Qatar's Emir, Sheikh Tamim bin Hamad Al-Thani, during a phone call on Tuesday.
At the same time, Iran has publicly denied that formal negotiations with Washington are taking place, underscoring the uncertainty that still surrounds any potential deal.
Security incidents and ongoing risk
Despite the more constructive diplomatic signals, security risks in the region remain evident. Another commercial vessel came under attack near the Strait of Hormuz on Tuesday, highlighting the fragile security environment that continues to affect shipping and supply-route risk assessments.
U.S. inventory data
Adding to the price pressure was industry data pointing to a build in U.S. crude inventories. The American Petroleum Institute reported that crude oil stockpiles rose by 2.69 million barrels in the week ended July 31, a figure that contrasted with analysts' expectations for a draw of about 2 million barrels. The market is awaiting official U.S. Energy Information Administration data due later on Wednesday to confirm the inventory trend.
Implications
The combination of improving diplomatic signals toward re-opening a critical shipping lane and a surprise build in U.S. crude stocks contributed to downward pressure on benchmark crude prices. Traders and market participants remained attentive to both further security developments in the Strait of Hormuz and the forthcoming EIA report for confirmation of inventory trends.