Global oil markets roared back to life on Monday as fresh escalation in the Middle East rattled investors, following Iran’s abrupt re-closure of the vital Strait of Hormuz—just a day after reopening it.
The move, triggered by Tehran’s accusation of a United States blockade of its ports, sent crude prices sharply higher and reignited fears over global energy supply disruptions.
The strategic waterway, through which roughly 20 percent of the world’s oil and liquefied natural gas flows, has become the epicentre of the standoff. Iran warned that any vessel attempting to pass without its approval would be treated as hostile, raising the stakes in an already fragile ceasefire.
Oil benchmarks responded instantly. US crude, West Texas Intermediate (WTI), surged more than seven percent at intraday highs, while Brent crude climbed over six percent—reversing steep losses recorded just days earlier when hopes of de-escalation briefly calmed markets.
Those hopes now appear shaky.
Despite US President Donald Trump’s insistence that Washington is “very close” to a deal with Tehran, Iran has pushed back firmly, rejecting key proposals and warning that its enriched uranium stockpile remains non-negotiable.
Tensions intensified further after a US naval destroyer reportedly fired on and seized an Iranian vessel accused of breaching the blockade. Tehran has vowed retaliation.
Diplomatic efforts also appear to be stalling. Iranian officials say there are currently no plans to attend the next round of talks with the United States, citing the ongoing blockade as a major obstacle. A previous 21-hour negotiation session in Islamabad earlier this month ended without a breakthrough.
Even so, global equity markets showed surprising resilience.
Investors, still clinging to the possibility of a last-minute diplomatic solution, pushed stocks higher across major markets. Wall Street extended record gains, with the S&P 500 and Nasdaq closing at fresh highs. Asian markets followed suit, led by strong performances in Tokyo, Seoul, and Taipei, as the tech rally regained momentum.
Market analysts warn, however, that volatility is far from over.
“The path to a formal agreement is unlikely to be smooth,” analysts at Pepperstone noted, adding that markets remain highly sensitive to sudden geopolitical shifts.
For now, the ceasefire hangs by a thread—and with no comprehensive agreement on Iran’s nuclear programme in sight, the risk of further escalation continues to loom over global markets.
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2026-04-21
