The war taught the region a costly lesson: dependence on a single supplier and a single shipping lane is no longer a risk worth taking.
Brent crude fell below $79 a barrel on Thursday, its lowest level since early March and nearly 40 percent below its wartime peak, as traders priced in the return of more than 100 stranded tankers and the gradual resumption of Iranian exports.
Cheaper oil, however, is not the same as restored confidence.
The blockade of Hormuz — which the International Energy Agency (IEA) described as the largest supply disruption in the history of the global oil market — showed how easily a single chokepoint could be weaponized.
That realization may prove the war's most enduring legacy.
"Despite the significant reductions in demand for crude oil and refined products, the buffers in the system continue to erode at a record pace," the agency said.
Yet the most striking lesson was how resilient the global economy proved.
The pain never approached the scale of the 1973 oil embargo, the 1980 Iran-Iraq war or even the disruption that followed Russia's invasion of Ukraine in 2022.
Many Asian and European importers entered the crisis with unusually high inventories after stockpiling fuel throughout 2025. Gulf producers also adapted faster than expected.
Saudi Arabia rapidly rerouted exports through its Red Sea port of Yanbu, boosting shipments to roughly 4 million barrels a day from less than 1 million before the war. Meanwhile, producers in the United States, Brazil and Venezuela increased output to offset shortages.
Global oil demand fell by an estimated 5 percent in the second quarter, according to the IEA, roughly half the declines recorded during previous major oil shocks.
Another powerful buffer emerged from an unlikely source: artificial intelligence.
But that protection was distributed unevenly.
The war carved a K-shaped divide across Asia.
Technology-heavy economies such as South Korea and Taiwan rode record market rallies even as manufacturing-intensive, fuel-importing countries struggled under surging energy costs.
Taiwan's economy expanded 13.69 percent in the first quarter, its fastest pace in 39 years, while South Korea's KOSPI surged past the stock markets of London and Toronto by market capitalization.
Poorer importers suffered a harsher reality.
Bangladesh and Sri Lanka imposed fuel rationing, several governments shut schools and restricted air conditioning, and the United Nations Development Programme estimated that about 8.8 million people across Asia and the Pacific were pushed closer to poverty.
China demonstrated another model altogether.
Despite cutting imports by roughly 3 million barrels a day, Beijing absorbed the shock by drawing on strategic reserves and relying more heavily on coal and renewable energy without major disruption to industrial activity.
Those divergent responses are now hardening into long-term strategy.
The IEA said this week the war had permanently changed how governments assess energy security, accelerating a diversification drive that began after Russia's invasion of Ukraine.
Solar investment alone is projected to reach $365 billion this year, while global coal investment will climb to a 14-year high of $180 billion, nearly 70 percent of it in China.
"Diversification of energy sources and supply routes is now a central priority," IEA Executive Director Fatih Birol said while releasing the agency's Southeast Asia Energy Outlook.
Southeast Asia, he noted, will account for about one-fifth of global energy demand growth over the next decade, second only to India.
That instinct to hedge has already become policy.
The physical damage may also outlast the ceasefire.
The IEA estimates the conflict has delayed a long-awaited wave of global liquefied natural gas supply by at least two years.
Repairing Qatar's Ras Laffan complex, the world's largest LNG export facility, could take three to five years, according to the Institute for Energy Economics and Financial Analysis.
But the deepest scar is one of trust.
After watching the world's most important energy artery throttled at will, importers are no longer willing to rely on a single guarantor. Instead, they are building capacity at home while diversifying suppliers abroad.
Birol summarized the new reality in a warning delivered in Washington earlier this year.
"We are dealing with one Hormuz now," he said. "There may be several Hormuz waiting if we fail to diversify."
For South Korea, where roughly 99 percent of Middle Eastern crude normally passes through Hormuz, the ceasefire is a relief, not a return to normal.
During the war, Seoul accelerated purchases from North America, Australia and Africa while unveiling plans to nearly triple renewable generation capacity to 100 gigawatts by 2030.
Hormuz will reopen.
The certainty it once carried will not.
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