Kospi Index Jumps 5.15% to 8,194.41 Amid 445 Point Drop as Goldman Predicts 40% Upside Potential Despite Risks

South Korea’s Kospi Index is one of the most remarkable market stories of 2026, and the numbers are hard to argue with. The Kospi has surged roughly 100% year-to-date, making it one of the world’s best-performing major indexes. On Wednesday, June 4, the index reached a new record of 8,900, marking a 12-month gain of 220%.

But June 5 brought a sharp reversal: the index fell 445 points before recovering to 8,194.41, a net session gain of 5.15% from Thursday’s close of 7,798. The volatility is a direct reflection of a market where two stocks, Samsung Electronics and SK Hynix, now account for more than 50% of the total index weight. When AI chips demand confidence waivers, the entire index moves with it.

Goldman Sachs Raises Target to 12,000

Goldman Sachs made a bold call on June 3, 2026, and the market noticed:

• Target raised: 12-month Kospi target lifted to 12,000 from 9,000, upgraded in less than a month, implying ~36% additional upside from current levels. 
• Earnings driver: 2026 Kospi earnings growth estimate raised to 277%, up from just 48% at the start of the year
• Broad-based upgrade: Earnings growth forecast for companies excluding Samsung and SK Hynix raised to 57% from 20% in January 
• Goldman’s stance: Overweight Korea, citing “higher earnings, underpriced memory cycle duration, and rerating catalysts” as the three core pillars

What Goldman Is Saying About Semiconductors

Goldman’s chief Asia Pacific regional equity strategist, Timothy Moe, called Korea its highest-conviction view, with 2026 earnings growth now forecast at 300%, the strongest annual profit expansion in any Asian market since the recovery from the Asian financial crisis in 1999.

Goldman said memory makers are gaining pricing power as computing demand grows faster than memory supply, and expressed conviction that this semiconductor cycle will last longer than past cycles. South Korean semiconductor stocks currently trade at about five times forward price-to-earnings, a level that Goldman sees as skeptical of how long high profitability will last.

Samsung and SK Hynix: The Twin Towers

The Kospi rally has brought Samsung Electronics (KRX: 005930) and SK Hynix (KRX: 000660) market capitalizations to over $1 trillion combined, more than the South Korean economy itself.

• Samsung Electronics: Core AI beneficiary; the dominant HBM and DRAM supplier to global hyperscalers
• SK Hynix: World’s leading HBM3E supplier; direct beneficiary of Nvidia’s (NASDAQ: NVDA) AI chip demand
• Combined weight: Over 50% of the Kospi market capitalization, meaning six of the last sessions saw negative breadth, even as the index rose 12.15% 
• 2026 earnings growth (excl. Samsung & SK Hynix): Revised up to 57% from 20%

Jonathan Krinsky, chief market technician at BTIG, flagged the breadth concern directly: “Over the last six sessions, the KOSPI is up 12.15%. Yet breadth was negative each day, and not by a little bit. That is what happens when a few of the largest names make up approximately 50% of an index.”

The Risk Picture: Leverage and Concentration

The June 5 intraday 445-point drop did not come from nowhere. Two structural risks are building underneath the Kospi’s record run.

Risk 1 — Forced liquidations at record levels. Despite the Kospi surging 28.4% in May alone, forced liquidations reached 707.7 billion won in that month, the year’s highest level. Investors who entered margin trades right after the Kospi broke through the 8,000 level were forced to liquidate amid successive bouts of volatility.

Risk 2 — Narrow breadth and weak domestic economy Peter Kim, global strategist at KB Financial Group, warned: “The stock market action is taking much of the attention away from the underlying vulnerabilities of the Korean economy. China is rapidly gaining market share from Korean exporters, and the broader domestic economy remains weak.”

Final Takeaways

The Kospi Index’s 2026 run is historic by any measure: 100% YTD, 220% over 12 months, and Goldman Sachs is now targeting 12,000 with 40% further upside. The earnings story is real: 277% growth forecast for 2026, semiconductor pricing power strengthening, and a memory supercycle that Goldman believes will outlast every prior cycle.

But the risks are just as real. Samsung Electronics and SK Hynix carry over 50% of the index weight, making every session a bet on two stocks. Breadth has been negative for six consecutive sessions, even as the index climbed. Forced liquidations hit a 2026 high of 707.7 billion won in May. China is gaining ground on Korean exporters. The domestic economy remains weak underneath the headline numbers.

The Kospi’s next test is clear: can the rally broaden beyond its twin towers, or does concentration risk trigger the correction that margin traders are already experiencing in smaller pockets of the market?

Disclaimer

The content shared by Meyka AI PTY LTD is solely for research and informational purposes. Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.