Global markets turned cautious at the start of the week after renewed tensions between Washington and Tehran disrupted the fragile optimism that had driven last week’s rally.
Oil prices jumped sharply following a chaotic weekend in the Strait of Hormuz, where the U.S. Navy seized an Iranian vessel and Tehran reportedly fired on ships while reimposing controls over the strategic waterway. The developments reignited concerns over energy supply disruptions just days before the current ceasefire is set to expire.
Brent crude surged about 5.7% to roughly $95.50 per barrel, reversing part of the decline seen during last week’s diplomatic optimism.
Risk Assets Pull Back
The resurgence in geopolitical risk prompted a cautious response across global markets.
S&P 500 futures slipped about 0.6% after the benchmark index had closed at a record high on Friday, when Iran declared the Strait of Hormuz “completely open.” The renewed tension suggests investors may have been premature in unwinding the geopolitical risk premium.
Treasuries declined across the curve as the surge in oil prices revived concerns that energy driven inflation could complicate the interest-rate outlook. The U.S. dollar also edged higher after falling for three consecutive weeks during the earlier diplomatic optimism.
Meanwhile, traditional hedges showed mixed reactions. Gold slipped toward $4,790 an ounce while silver dropped roughly 1%. Bitcoin also edged slightly lower, trading near $74,500.
Despite the volatility, most of Monday’s market moves largely returned prices to levels seen late last week, indicating that investors remain cautious but not yet convinced that the conflict will escalate significantly.
Diplomacy Back in Question
The key focus now is whether negotiations between the U.S. and Iran can resume before the ceasefire expires later this week.
Initial talks in Islamabad failed to produce a breakthrough, and Iranian officials have signaled they may refuse to participate in a second round of negotiations while a U.S. naval blockade remains in place.
President Donald Trump added to the uncertainty by warning that the U.S. could target critical infrastructure in Iran if diplomacy collapses. The sharp shift in rhetoric underscores how much of last week’s market rally was built on expectations rather than concrete progress.
For investors, the critical issue remains the operational status of the Strait of Hormuz. Roughly one fifth of global oil supply flows through the waterway, making it one of the most sensitive pressure points in global energy markets.
Until shipping flows normalize, traders will likely remain cautious about removing the geopolitical risk premium from oil and broader markets.
What Traders Should Watch Closely
– Strait of Hormuz Shipping Activity:
Confirmation that vessels can move safely through the waterway will determine oil’s next direction.
– Brent Crude Near $95–$100:
A sustained break above $100 could reignite inflation fears and pressure equities.
– US – Iran Ceasefire Expiry This Week:
Whether the truce is extended will shape market sentiment in the near term.
– Dollar Safe Haven Demand:
A stronger dollar would indicate rising geopolitical risk aversion.
– Treasury Yield Reaction:
Rising yields alongside higher oil suggest markets are pricing inflation risk again.
– Diplomatic Headlines:
Any confirmation of resumed negotiations could quickly reverse risk off moves.
Markets are once again being driven by geopolitical headlines rather than economic fundamentals. The Strait of Hormuz remains the single most important trigger for oil, inflation expectations and risk sentiment. Until energy flows stabilize and diplomatic progress becomes tangible, traders should expect continued volatility across commodities, currencies and equities.