LONDON, July 8 — The oil market is once again staring down the barrel of geopolitical risk, with the memory of a sharp price spike in late March still fresh for traders. On March 30, 2025, global crude prices surged nearly 6% after President Trump declared the U.S.-Iran ceasefire “over,” a statement that sent West Texas Intermediate crude climbing 5.8% to settle at $73.45 per barrel. Brent crude, the international benchmark, rose 5.6% to $77.89 per barrel on the same day, according to Reuters data.
The technical reality of that move was unambiguous. A near-six percent single-day jump in crude is the kind of event that forces portfolio managers to reassess their risk models.
The trigger was political, but the mechanism was pure supply-chain arithmetic: the Strait of Hormuz, through which about a fifth of the world’s petroleum passes, suddenly looked vulnerable again. Analysts at Goldman Sachs projected that oil could reach $85 per barrel if the crisis escalates, a figure that now sits in traders’ minds as a plausible upper bound.
The broader market reaction
The equity markets took the news badly, as they often do when energy costs threaten to squeeze margins across the economy. The S&P 500 fell 1.2% to 5,432 points, while the Dow Jones Industrial Average dropped 1.0% to 42,100 points. Energy stocks, as ever, moved in the opposite direction.
ExxonMobil rose 3.5% to $118, and Chevron gained 4.2% to $165, reflecting the sector’s direct benefit from higher crude prices. The detail that matters for fixed-income investors: the yield on the 10-year U.S. Treasury note fell 5 basis points to 4.15%, a classic flight-to-safety move.
The U.S. dollar index gained 0.3% as investors sought safe havens, and gold prices rose 1.1% to $2,050 per ounce. It was a textbook risk-off rotation, with the exception of energy equities, which enjoyed their own peculiar tailwind.
Under the hood of supply mechanics
The U.S. Strategic Petroleum Reserve stands at 375 million barrels, a figure that invites comparison to 2022, when 180 million barrels were released to calm markets during the Russia-Ukraine supply shock. That precedent is well understood by the current administration. President Trump, with Vice President JD Vance and Secretary of State Marco Rubio, has the option to tap the reserve again if prices threaten to destabilise the domestic economy.
Whether that lever gets pulled depends entirely on how the Iran situation evolves. OPEC+ holds spare capacity of about 4 million barrels per day, concentrated primarily in Saudi Arabia and the UAE.
As of the March 30 event, the cartel had not signaled any output changes. That silence is itself a signal. The spare capacity exists, but deploying it is a political decision as much as a technical one.
The Saudis have their own calculus regarding Iran, and the UAE has its own production targets. Traders are watching for any hint of a coordinated response.
What to watch next
The market reaction on March 30 was a snapshot of a single day, but the underlying tensions have not dissipated. The Strait of Hormuz remains the chokepoint that keeps energy analysts awake at night. The U.S. Strategic Petroleum Reserve is a finite tool, and OPEC+ spare capacity is a strategic asset that no one deploys lightly. For now, the price action sits in the memory of traders as a warning shot. If the crisis escalates further, the $85 per barrel projection from Goldman Sachs will move from a scenario to a baseline.
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