Oil prices jumped sharply on Monday, with Brent crude rising more than $4 per barrel, as fresh Israeli strikes on Iranian targets and renewed attacks on Lebanon eroded optimism for a quick diplomatic resolution and heightened concerns over global energy supplies.
At the same time, U.S. Treasury yields edged higher, and the dollar strengthened, reflecting a classic risk-off environment where geopolitical tensions fuel inflation fears and bolster the safe-haven currency.
Brent futures climbed $4.42, or 4.47%, to $97.15 per barrel by early European trading, while U.S. West Texas Intermediate crude gained $4.07, or 4.50%, to $94.61. The moves erased Friday’s losses and pushed prices back toward recent highs, though they remain below the peaks near $120 seen in March shortly after the war began.
Israel said it struck a petrochemical plant in Iran’s southwest Mahshahr complex, the first direct hit on an energy facility inside Iran since the fragile April ceasefire, along with other military targets. A provincial official confirmed damage to parts of the site. The strikes came despite reported urging from U.S. President Donald Trump for Israeli Prime Minister Benjamin Netanyahu to hold back.
Hopes for an imminent diplomatic breakthrough and reopening of the Strait of Hormuz have now faded significantly. Iran has made a ceasefire in Lebanon a precondition for any broader deal with Washington. On Sunday, Iran fired missiles at Israeli targets in retaliation for strikes on Lebanon, further complicating negotiations.
Iran’s ambassador to Moscow, Kazem Jalali, told Russian newspaper Izvestia that the Strait of Hormuz would reopen but under new conditions set by Iran and Oman, including the possible imposition of a transit fee. This would mark a historic shift in control over one of the world’s most vital energy arteries, which normally carries about one-fifth of global oil and LNG supplies.
The waterway has been largely blocked since late February, creating the biggest supply crisis in history. Combined with U.S. retaliatory measures against Iranian ports, this has severely restricted flows and kept physical supply tight even as traders speculate on diplomatic progress.
Treasury Yields and Dollar Gain Traction
The escalation in the Middle East sent U.S. Treasury yields higher across the curve as investors priced in persistent inflationary risks from elevated energy costs. The benchmark 10-year note yield increased 2.6 basis points to 4.562%, the 2-year rose 1.2 basis points to 4.174%, and the 30-year climbed 2.2 basis points to 5.02%.
The dollar traded near its highest level in nearly two months, supported by a combination of safe-haven flows and renewed bets on Federal Reserve rate hikes later this year. The euro hovered near nine-week lows around $1.1525, while the pound traded near three-week lows at $1.3344. The yen remained under pressure and close to intervention territory.
This bond market reaction underlines the dual pressures facing the Fed under new Chair Kevin Warsh: a resilient U.S. labor market (evidenced by Friday’s stronger-than-expected jobs report showing 172,000 nonfarm payrolls) combined with energy-driven inflation risks. Markets now price in roughly a 50% chance of a rate hike by September, with some analysts forecasting two 25-basis-point increases before year-end.
“The U.S. payrolls report paints a picture of a U.S. labor market that is strengthening despite the ongoing energy price shock. That combination makes policy tightening by the Fed later this year increasingly probable,” Jonas Goltermann, chief markets economist at Capital Economics, said.
OPEC+ Output Hikes Offer Limited Relief
In a separate development on Sunday, OPEC+ agreed to its fourth consecutive monthly increase in output targets. The seven core members will raise quotas by another 188,000 barrels per day from July. However, analysts said the decision has minimal practical effect while the Hormuz closure persists.
Jorge Leon, head of geopolitical analysis at Rystad Energy and a former OPEC official, noted: “An OPEC+ production increase means very little while the Strait of Hormuz remains closed. When the Strait of Hormuz reopens, the market could move very quickly from fear of shortage to fear of surplus.”
The group is gradually unwinding a 2023 production cut, but actual output has collapsed due to export restrictions. April production averaged just 33.19 million bpd, down sharply from 42.77 million bpd in February. The UAE’s departure from OPEC after nearly 60 years further complicates the group’s cohesion.
However, the renewed spike in oil prices has added significant uncertainty to the global economic outlook. Higher energy costs feed directly into inflation readings, complicating central bank efforts worldwide and raising borrowing costs at a sensitive time.
Economists have also warned that the combination of geopolitical risk premiums, resilient U.S. labor data, and shifting Fed expectations is creating a volatile environment for financial markets. Equities, particularly in tech and growth sectors, face headwinds from higher yields and energy costs, while defensive and energy-related assets may find support.





