KOSPI Reclaims 5,600: Index Reduces Pullback By Half, as Volatility Continues

South Korea’s benchmark KOSPI index closed above 5,600 for the first time since early March, extending a dramatic two-week rebound that has added 10% to the gauge following a geopolitically triggered crash that briefly wiped out nearly a fifth of the market’s value in just two sessions.

The KOSPI settled at 5,640.48 on the session, gaining 1.63% and marking a decisive technical reclaim of the psychologically important 5,600 level. The recovery comes after the index plunged 19.24% in three consecutive sessions following its February 26 close, when it had been trading near an all-time high of 6,307.27. Despite the recent turbulence, the index remains up 30.88% year-to-date, a performance that has vaulted South Korea’s equity market capitalisation to around USD 3.8–3.9 trillion and past both France and Germany to become the world’s seventh-largest stock market.

Samsung Electronics shares, which accounts for roughly a quarter of the KOSPI’s capitalisation, advanced 2.76% in the session and has now climbed 50.89% since the start of 2026. SK Hynix, the second pillar of Korea’s technology complex, slipped 0.41% on the day but remains up 43.28% year-to-date. LG Energy Solution, a key battery manufacturer, added 3.96% to close at 380,500 won, underscoring the breadth of the rally beyond pure semiconductor plays.

Recent Volatility

The violent swings in Korean equities trace back to March 3, when a sharp spike in liquefied natural gas prices, triggered by an Iranian attack on Qatar’s gas infrastructure, sent shockwaves through the energy-import-dependent economy. Samsung fell approximately 10% and SK Hynix dropped around 11% that day as markets priced in a material increase in input costs for Korea’s export-heavy industrial base. Follow-on selling and forced deleveraging through margin calls pushed the index into an 18% drawdown over the subsequent 48 hours, prompting global discussions about whether such extreme moves could presage similar volatility in other developed markets.

The rebound has been equally dramatic. In a single session during the recovery phase, the KOSPI surged more than 11%—its best daily performance since 2008—with Samsung and SK Hynix each jumping 14–15%. Trading was briefly halted due to the speed of the rally, and foreign institutional investors have since returned as net buyers, using the dislocation to re-enter positions in what many view as a structurally undervalued exposure to the global artificial intelligence hardware buildout.

SK Hynix reported a record operating profit of 47.2 trillion won in 2025, surpassing Samsung Electronics for the first time, driven by its leadership position in high-bandwidth memory for AI data centres. The company allocated approximately 6.7 trillion won to research and development last year, with a substantial portion dedicated to next-generation HBM and advanced packaging technologies. Samsung, meanwhile, has seen aggressive sell-side price targets from brokers including Nomura, which has set a target around 290,000 won per share, reflecting expectations that the market is still under-pricing the company’s role in AI infrastructure and the potential for margin expansion as memory pricing firms.

Outlook

The structural bull case for Korean equities rests on several pillars. First, the AI server buildout and surging demand for advanced memory solutions have positioned Samsung and SK Hynix as indispensable suppliers to the global technology supply chain, with both companies benefiting from multi-year visibility on orders. Second, Korea’s equity market is no longer a fringe emerging-market allocation; its ascent to seventh-largest globally has made it a core holding for international equity portfolios, and record inflows into Korea-focused exchange-traded funds underscore the momentum behind the trade.

Analysts emphasise that the index’s volatility is structurally amplified by concentration rather than by bubble dynamics. With two stocks accounting for roughly one-third to one-half of the KOSPI’s market value, even modest percentage moves in Samsung or SK Hynix translate into large index swings. This has led some commentators to frame the recent turbulence as “a concentration story, not a bubble story,” distinguishing Korea’s situation from broader market froth.

Yet the risks are equally pronounced. The LNG shock exposed Korea’s vulnerability to energy price spikes and geopolitical disruptions in the Middle East, a reminder that any renewed stress in global shipping lanes or commodity markets can rapidly compress margins and trigger de-risking. The magnitude of recent moves, 18% down in two days, then 11% up in a single session, also highlights the presence of leveraged positioning and the potential for violent unwinds when sentiment shifts. Some investors are taking profits after the 50%-plus year-to-date gain in Samsung, citing late-cycle behaviour in memory upturns and the risk that AI server orders could normalise faster than the market currently anticipates.

Brokerages have set ambitious index targets, with some projecting the KOSPI could reach 7,500 to 8,000 over the medium term, framing Korea as a core AI hardware and advanced manufacturing hub. However, the same crowded positioning that has fuelled the rally also creates the conditions for sharp reversals, particularly if global growth disappoints or if geopolitical risks resurface.

The KOSPI’s recapture of 5,600 marks a significant psychological milestone in a year already defined by extremes, but the path forward will likely remain turbulent as markets weigh the structural tailwinds of the AI cycle against the acute risks of concentration, leverage, and external shocks that have made Korean equities one of the most volatile major indices in the developed world.