U.S. energy stocks fell in premarket trade on Monday after crude futures plunged following news of an initial agreement between the United States and Iran that could bring an end to the months-long confrontation and allow the reopening of the Strait of Hormuz.
Pakistan's prime minister said his country had helped mediate the talks and that Washington and Tehran will sign a memorandum of understanding in Switzerland on Friday. In comments reported on Sunday, U.S. President Donald Trump said the Strait of Hormuz - which carries roughly a fifth of global oil consumption - would be open "toll free" and that a U.S. naval blockade of Iranian ports would end.
Markets reacted swiftly. By 0928 GMT, Brent crude futures had fallen 5.2% to $82.83 per barrel, while U.S. West Texas Intermediate crude declined 5.6% to $80.09 per barrel.
In equities, major U.S. oil majors and other energy producers saw declines. Shares of Exxon Mobil fell about 3% and Chevron dropped roughly 2.6%. Independent producers Diamondback Energy, Devon Energy, ConocoPhillips and Occidental Petroleum were down in the range of about 2.8% to 3.7%. Refiners were also hit, with Valero Energy, Marathon Petroleum and Phillips 66 falling between roughly 2% and 4.6%.
European oil companies moved lower as well, with BP down about 3.7% and Shell off roughly 4.2%.
Analysts cautioned that the initial drop in prices and stocks reflects financial markets pricing in a return toward normal conditions, but warned that restoring physical oil supplies and shipping patterns may take longer.
"Markets will price in a large optimism discount that 'normality' is returning, although we would caution that flows are not likely to resume to anywhere near pre-war levels for months, and investors should follow how quickly Gulf producers are able to resume oil production and exports following damage from the war and whether more ships will enter the region," said Ashley Kelty, analyst at Panmure Liberum.
"Even if ships now have safe passage, tankers are in the wrong place, oil production/refining facilities need to get up to full capacity, and questions over the cost and availability of insurance for ships traversing the Strait will remain," said Neil Shearing, group chief analyst at Capital Economics.
Energy stocks had rallied earlier in the conflict as markets priced in the possibility of shipments being disrupted through the Strait of Hormuz. The latest developments appear to have led investors to trim those positions as the prospect of reopened shipping lanes and an end to a naval blockade reduced an immediate supply-risk premium in crude prices.
Observers noted that while headlines and financial market moves can shift quickly, the practical steps needed to restore pre-conflict production and export flows - including repairs to facilities, repositioning of tankers and resolution of insurance issues - will be factors to monitor in the weeks and months ahead.