July 7, 2026 (KST), the Korea Composite Stock Price Index (KOSPI) closed at 7,656.31, plunging 4.91% in a single day. At one point during the session, it tumbled 8.22%, triggering the circuit breaker mechanism. While short-term volatility has been intense, zooming out reveals that KOSPI was the standout performer among major Asian stock indices in the first half of 2026—nearly doubling in value. Goldman Sachs maintained its 12-month KOSPI target at 12,000 points in its July 5 report, suggesting more than 20% upside from current levels.
The coexistence of sharp gains and wild swings is central to understanding today’s KOSPI market. This article systematically examines the three core drivers behind KOSPI’s rally from macroeconomic, industrial, and capital market perspectives.
Driver 1: Record-Breaking Exports—Semiconductors as the Absolute Engine
In June 2026, South Korea’s monthly exports surpassed $100 billion for the first time, reaching $102.25 billion—a 70.9% year-over-year increase. This milestone makes South Korea the fourth country, after Germany, China, and the United States, to achieve $100 billion in exports in a single month. The trade surplus for the same period hit $36.15 billion, also a historic high.
Semiconductors were the undisputed core of this export surge. In June, semiconductor exports soared to $44.82 billion, up 199.5% year-over-year, breaking the $40 billion mark for the first time in a single month. The explosive growth in memory chips was particularly notable—memory exports in June grew 280% year-over-year, marking the fifth consecutive month with over 200% growth. DRAM exports surged 385%, the strongest level since 2008. NAND chip exports rose 301%, while SSD exports jumped 355%.
Cumulative data for the first half of the year is equally impressive. From January to June 2026, South Korea’s total exports reached $496.7 billion, up 48.4% year-over-year. Semiconductor exports totaled $192.4 billion, already surpassing the full-year 2025 figure ($173.4 billion). Semiconductors accounted for 38.7% of South Korea’s exports in the first half.
According to Huatai Securities, South Korea’s robust export growth signals that the global AI supply chain remains on a strong upward trajectory. The Philadelphia Semiconductor Index, which leads Korean semiconductor exports by about four months, is still high year-over-year, suggesting continued strength in Korea’s semiconductor exports. Additionally, with strong AI-driven demand, memory prices are still rising, further supporting nominal export values.
Export data provides the macro foundation for KOSPI’s rally. South Korea’s economy is highly dependent on external demand, and semiconductors, as the largest export category, directly impact corporate earnings and index performance. The explosive export growth in the first half of 2026 delivered the most solid revenue support for KOSPI’s valuation expansion.
Driver 2: AI Memory Supercycle and Exponential Corporate Earnings Growth
Behind the export numbers lies a fundamental reshaping of memory chip demand by the global wave of AI infrastructure investment. Tech giants worldwide continue to ramp up capital spending on large language models and data centers, directly boosting both the volume and price of high-end memory products like HBM and DDR5.
On the earnings front, Samsung Electronics and SK Hynix have delivered the most compelling results. In Q2 2026, Samsung Electronics posted operating profit of KRW 89.4 trillion (about $58.44 billion), soaring roughly 18-fold from KRW 4.7 trillion a year earlier. Revenue grew 129% year-over-year. This figure not only far exceeded market expectations (KRW 87.3 trillion), but also pushed Samsung’s quarterly profit to an all-time high. SK Hynix also benefited from the memory price upcycle, with strong earnings growth.
Goldman Sachs estimated in its July 5 report that overall earnings growth for the Korean stock market will reach 320% in 2026, with another 35% increase in 2027. The report highlighted that Samsung Electronics and SK Hynix contributed about 90% of KOSPI’s gains in the first half.
Daishin Securities offered an even more optimistic outlook, arguing that most recent concerns about the AI and semiconductor sectors lack foundation. Strong Q2 profits and upward revisions starting in Q3 will drive KOSPI toward the 10,000-point level.
Exponential earnings growth is the core denominator driving KOSPI’s valuation expansion. When earnings growth far outpaces share price gains, valuations can remain reasonable—or even low—despite sharp index increases. As Mirae Asset Securities analysts noted, KOSPI’s 12-month forward EPS has already surpassed 1,000 points, while the current index’s 12-month forward PER is below 8x, keeping valuations attractive.
Driver 3: Capital Structure and Policy Expectations—A Dual Narrative
Macro data and corporate earnings explain "why the index is rising," while capital structure and policy expectations explain "why the rally can persist."
On the capital side, Korea’s stock market exhibits a distinct "domestic versus foreign" split. In the first half of 2026, foreign investors were net sellers of KOSPI stocks, offloading about KRW 148–150 trillion ($95–100 billion). On July 8, foreigners continued net selling, roughly KRW 3.3 billion. However, this persistent foreign outflow hasn’t stopped the index’s ascent—the buying power came from domestic investors, especially retail investors flooding into the market.
Since May, Korean retail investors have accumulated net purchases of KRW 62 trillion. Leverage exposure as a percentage of Korea’s free-float market cap has hit 2.9%, a new record, more than doubling since the start of the year. The combined assets under management of Korea’s 16 single-stock leveraged ETFs have reached $9.1 billion.
Goldman Sachs takes a relatively optimistic view. The report notes that while retail investor activity has increased, retail exposure remains well below levels typically associated with overheated markets. Much of the growth in leveraged ETF assets comes from valuation gains due to rising stock prices, rather than new borrowing. Furthermore, Korean households still allocate substantial assets to real estate, cash, and overseas equities (mainly US stocks). If market conditions remain favorable, Korean investors have ample room to further increase allocations to domestic equities.
Policy expectations form another important narrative. On January 15, 2026, Korea’s National Assembly passed the Electronic Registration Act for Stocks and Bonds and amendments to the Capital Markets Act, laying a legal foundation for the issuance and circulation of security tokens. Although progress on the Digital Asset Basic Act has been delayed, the Korea Economic Research Institute proposed on July 6 to accelerate legislation promoting security token (STO) adoption. The Bank of Korea is advancing the second phase of its "Han River Project," aiming to establish a formal digital currency system and commercialize deposit tokens.
At the macro level, Korea’s Ministry of Finance issued a statement on July 8, pledging to intensify efforts to stabilize the economy and financial markets amid heightened volatility—including the FX market—and plans to finalize and announce a "KRW internationalization roadmap" by the end of July. Deputy Prime Minister Koo Yun-cheol stated that the government will closely monitor risk factors that could trigger excessive stock market volatility and adjust long-term government bond issuance ratios to ensure market stability.
The tug-of-war between institutional selling and retail leveraged capital, policy focus on financial market stability, and the advancement of digital assets and KRW internationalization together shape the complex capital and policy backdrop for KOSPI. While these factors don’t directly push the index higher, they influence market risk appetite and liquidity, providing institutional and capital conditions for valuation expansion.
Risk Factors: Hidden Concerns Beneath the High-Growth Narrative
The logic behind the rally is clear, but risks remain significant.
First, sector concentration risk. Samsung Electronics and SK Hynix contributed about 90% of KOSPI’s gains in the first half. This extreme concentration means that if the semiconductor sector’s momentum reverses, the index faces systemic correction pressure. The Bank of Korea has issued risk warnings about single-stock leveraged ETFs tied to Samsung and SK Hynix, noting that these products may amplify volatility and worsen market concentration. Some lawmakers have even called for the delisting of single-stock leveraged ETFs.
Second, geopolitical and energy risks. KOSPI’s sharp drop on July 8 was directly triggered by escalating tensions in the Middle East. Uncertainty between the US and Iran, along with shipping risks in the Strait of Hormuz, drove up international oil prices. WTI crude rose 2.80% to $72.41, while Brent crude climbed 2.78% to $76.22. As a major energy importer, Korea faces higher import costs, shrinking trade surpluses, and potential hits to corporate earnings when oil prices rise.
Third, the possibility of earnings growth peaking. Market consensus suggests that Samsung Electronics’ operating profit growth rate will peak in Q2 2026, while SK Hynix will peak between Q2 and Q3. Although annual growth remains high, the marginal slowdown in quarter-over-quarter growth could trigger a valuation reset.
Conclusion
KOSPI’s performance in the first half of 2026 is the result of a three-way resonance: macroeconomics (record exports), industrial structure (AI memory supercycle), and capital structure (domestic capital absorbing institutional selling pressure). Export data underpins the fundamentals, corporate earnings support valuations, and capital and policy expectations provide the marginal momentum for continued gains.
Goldman Sachs’ 12,000-point target and Daishin Securities’ 10,000-point forecast are both based on assumptions of sustained high earnings growth. However, risks such as sector concentration, geopolitics, and potential turning points in the earnings cycle mean that the path of this rally "will be rugged, not smooth."
For market participants, understanding the drivers behind KOSPI’s rise also means recognizing the conditions under which these drivers could reverse. With the AI memory supercycle still intact and Korea’s export boom ongoing, KOSPI’s medium-term direction remains clear. Yet, increased volatility and the buildup of leveraged capital mean that every correction could be deeper and faster than linear expectations.
FAQ
Q: How much did KOSPI actually rise in the first half of 2026?
Goldman Sachs noted in its July 5 report that KOSPI delivered the highest returns among Asian stock markets in the first half of 2026, with the benchmark index nearly doubling. The surge was mainly driven by AI memory chip leaders like Samsung Electronics and SK Hynix.
Q: What is Goldman Sachs’ target price for KOSPI, and what is the rationale?
Goldman Sachs set a 12-month KOSPI target at 12,000 points, offering more than 20% upside from early July levels. The rationale includes an expected 320% earnings growth in 2026, a forward PER of 6.65x, and the expectation that the rally will spread from AI semiconductors to sectors like energy, raw materials, and industrials.
Q: Are foreign investors still selling Korean stocks?
Yes. In the first half of 2026, foreign investors were net sellers of KOSPI stocks, offloading KRW 148–150 trillion. On July 8, foreign investors continued net selling of about KRW 3.3 billion. Foreign outflows have persisted for 13 consecutive trading days.
Q: How risky is leveraged trading among Korean retail investors?
Leverage exposure as a percentage of Korea’s free-float market cap has reached 2.9%, a new record. The Bank of Korea has issued risk warnings about single-stock leveraged ETFs, noting their potential to amplify volatility. However, Goldman Sachs believes retail exposure remains well below typical overheating levels.
