By Vlad Signorelli
While Wall Street fixates on the 'Magnificent Seven,' South Korea's KOSPI has quietly delivered a stunning 75% gain since January
South Korea's stock market and its economy are booming.
South Korea's mix of technological leadership and pragmatism builds the kind of market rallies that last.
South Korea has been the world's single best-performing major market this year - its benchmark KOSPI index has soared 75% in U.S.-dollar terms through May 7. The Nasdaq composite COMP? Up 11%.
There's good reason for stock investors to stick with South Korea, even now.
The base case is straightforward: Korean equities keep charging ahead. Seoul secured abundant energy supplies to fuel its red-hot tech sector despite the Strait of Hormuz disruptions. Additionally, there are no nasty new taxes or rate hikes on the horizon that could kill the momentum.
The one real flashpoint would be weeks of $115-plus oil (CL.1). That kind of sustained surge could reignite inflation and force the Bank of Korea to turn hawkish, slamming equities the same way the U.S. Federal Reserve crushed markets in 2022. But this tail risk is fading fast. The worst of the oil spike already passed about a month ago, and geopolitics look less dangerous for now.
Most U.S. investors still see South Korea as yesterday's electronics play - rather than the emerging-market winner at the heart of the AI buildout.
This oil scare threatened one of the least-appreciated stories in the global artificial-intelligence boom. Most U.S. investors still see South Korea as yesterday's electronics play - rather than the emerging-market winner at the heart of the AI buildout. But that's exactly what South Korea is.
Samsung Electronics (KR:005930) and SK Hynix (KR:000660) dominate the market for high-bandwidth memory - the advanced chips that power AI servers and data centers. In short, the iShares MSCI South Korea exchange-traded fund EWY offers more than just country exposure. It gives investors a backdoor stake in the AI supply chain.
How South Korea navigated a closed strait
What looked close to an existential crisis in late March had become manageable by mid-April.
When oil prices spiked and the Strait of Hormuz sat exposed, the risks looked obvious. A country that imports nearly all its energy would be toast. For energy-poor South Korea, with 68 days of strategic reserves, this was a real test. The government imposed its first fuel-price caps in almost 30 years, ordered conservation measures including five-day rotations for public-sector vehicles, pushed coal plants harder, lifted nuclear utilization above 80% and banned fuel exports. Officials modeled worst-case scenarios as the reserve cushion began to feel thin.
South Korean stocks reacted sharply. EWY dropped by 18.7% from late February to March 26 - its worst monthly decline since 2008. Ten-year government-bond yields jumped 50 basis points (0.50%) to 3.84%. The AI-driven rally suddenly looked vulnerable to a commodity shock.
Then came the pivot. President Lee Jae Myung warned that supply-chain disruptions and high oil prices could drag on and ordered officials to treat new supply routes and industrial restructuring as strategic priorities. He sent his chief of staff, Kang Hoon-sik, on diplomatic missions.
Kang was clear about the stakes. Securing alternative supplies counted as &#34;the most urgent task for overcoming the economic emergency,&#34; he said. &#34;If we can secure even one barrel of crude or one ton of naphtha, the trip pays.&#34;
In late March, Seoul launched a strategic stockpile swap program that let refiners borrow government-owned Middle East crude right away and repay later with cargoes from new suppliers. The program, first set for April and May, was quickly extended through June. A further extension to July remains under review.
By April 15, officials announced they had locked in 273 million barrels of crude and 2.1 million tons of naphtha through year-end on routes that bypassed Hormuz. On April 24, Kang released the headline number: 74.62 million barrels secured for May alone - equal to 87% of the prior year's monthly average. &#34;There is little need to be concerned over supply disruptions,&#34; he said.
By ramping up purchases from the Americas and Africa, South Korea slashed its dependence on Middle East crude from 69% to 56% in a single month. Port data confirmed the shift: The share of non-Middle East crude among Ulsan port arrivals jumped from 12% to 30%.
The stockpile swaps bridged longer shipping times, and alternative cargoes began to arrive in force. Refineries and petrochemical plants never faced the shutdowns markets had feared.
What looked close to an existential crisis in late March had become manageable by mid-April.
The rebound
The Hormuz bottleneck still exists. The panic does not.
The market noticed. EWY snapped back from its March lows, climbed through April, hit fresh highs and kept rising. The Hormuz bottleneck still exists. The panic does not.
South Korea's chip story never vanished. Samsung and SK Hynix kept their place in the AI buildout. What changed was the removal of the one obvious threat to the trade: a prolonged energy and feedstock squeeze severe enough to hit industrial output.
The Hormuz disruption delivered the biggest physical supply shock South Korea has faced since the oil crises of 1973 and 1979. Those earlier shocks exposed the country's weaknesses and forced it to build the systems it used this time: large strategic stockpiles, expanded nuclear capacity and a more flexible supply base.
Faced with a crisis it could not control, Seoul adjusted to the world as it existed rather than waiting for the world to fix itself. That mix of technological leadership and pragmatism builds the kind of market rallies that last.
Vlad Signorelli is president of Bretton Woods Research, a macroeconomic forecasting firm.
More: South Korean stocks just enjoyed their second-best month ever - and now the market is bigger than the U.K.
Also read: Here's the real reason South Korea has the hottest stock market in the world
-Vlad Signorelli
This content was created by MarketWatch, which is operated by Dow Jones &amp; Co. MarketWatch is published independently from Dow Jones Newswires and The Wall Street Journal.
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05-07-26 1559ET

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South Korea's KOSPI index has surged 75% in 2023, outperforming the Nasdaq's 11% gain. The country's strong tech sector, led by Samsung and SK Hynix, is positioned at the forefront of the AI boom. Despite initial fears over energy supply disruptions due to rising oil prices, South Korea has successfully secured alternative energy sources, reducing dependence on Middle Eastern crude. This strategic maneuvering has bolstered investor confidence, leading to a recovery in South Korean stocks, which are now seen as a key player in the global AI supply chain.

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