[Sep 7, 2026 Korea Market Closing] What Driven the KOSPI Past 6,900 as US-Bound Investment Projects Gain Momentum? KOSPI Surges 4.61% Driven by Memory Semiconductor Boom and US Investment Catalysts

Market Summary

On September 7, 2026, the Korean stock market experienced a historic surge, with the KOSPI rising 4.61% to close at 6,995.39. A dramatic decline in memory chip inventories alongside concrete progress on Korea’s $350 billion US investment initiative fueled powerful bullish sentiment across major sectors.

• 📌 [Semiconductor Supercycle]: Inventories at Samsung Electronics and SK Hynix plunged to around 10 days, reassuring investors of a prolonged memory supercycle.
• 📌 [US-Bound Investment Execution]: The Encinal gas combined cycle power plant in Texas emerged as the top candidate for Korea’s $350 billion US investment, alongside discussions for 8 nuclear power units.
• 📌 [Musinsa KOSPI Listing]: E-commerce leader Musinsa filed for a preliminary IPO review on the main board, signaling renewed vitality in Korea’s listing pipeline.

Driven by massive semiconductor momentum and strategic bilateral investments, the Korean market showed exceptional strength. However, investors should remain attentive to overall trading volume shifts and external macro factors.

Author’s Opinion & Investment Strategy

Watching today’s price action was genuinely exhilarating as heavyweights led the index past 6,900. From a personal portfolio perspective, seeing such strong momentum in tech and energy infrastructure offers clear clues on where to allocate capital effectively.

• 💡 [Maintain Core Tech Exposure]: With memory inventories at multi-year lows, the earnings outlook for Samsung and SK Hynix overrides short-term noise, favoring a sustained overweight stance.
• 💡 [Target Infrastructure Winners]: Focus on energy plant engineering and equipment firms positioned to win actual contracts under the $350B US investment initiative.
• 💡 [Capitalize on IPO Revival]: Large-scale IPO applications like Musinsa’s provide positive liquidity signals for the broader market, making related ecosystem plays worth tracking.

During sharp market rallies, staying disciplined and focused on companies with proven earnings strength and clear policy tailwinds remains the best strategy.

Deep Dive of News Channels

① Naver Finance - Summary

Key discussions centered on the memory semiconductor supercycle driven by critically low inventories and concerns over Q3 brokerage earnings due to falling trading volume.

• 🔹 [10-Day Chip Inventory]: Memory inventories at Samsung Electronics and SK Hynix fell to 10 days, reinforcing supercycle expectations.
• 🔹 [Brokerage Volume Slump]: Declining market trading volume raised concerns over Q3 commission revenues for brokerage firms.

• Samsung Electronics: With memory inventory dropping to just 10 days, earnings recovery expectations are reaching new peaks. High global demand for AI and server chips is expected to significantly boost profitability.
• SK Hynix: Alongside Samsung Electronics, SK Hynix is maintaining record-low inventory levels while demonstrating strong technological leadership in premium memory. This supercycle position supports further valuation re-rating.
• Domestic Securities Firms: Declining daily stock trading volume is putting pressure on brokerage commission income for the third quarter. Firms are working to diversify revenue channels into wealth management to cushion earnings volatility.
• DNA Analysis Tech Companies: DNA sequencing costs have plummeted from $100 million in the past down to $200, accelerating mass adoption across genomic healthcare. Technical breakthroughs are unlocking new long-term commercial opportunities.

② Yonhap News Economy - Summary

Coverage highlighted the Encinal gas power plant in Texas as the leading $350B US investment candidate, along with Musinsa’s formal KOSPI IPO application.

• 🔹 [1st US Investment Project]: The Encinal gas combined cycle plant in Texas emerged as the prime project under the $350B bilateral plan.
• 🔹 [Musinsa IPO Filing]: Fashion e-commerce giant Musinsa officially started its preliminary review process to list on the KOSPI.

• Musinsa: By submitting its preliminary IPO review application to the Korea Exchange, Musinsa took its first formal step toward a main-board listing. As a top fashion platform, it is attracting substantial market attention.
• Encinal Gas Power Plant Partners: With the Texas gas power plant positioned as the primary US investment project, construction and equipment partners expect strong order inflows. Bilateral energy cooperation provides long-term growth visibility.
• Korea Exchange: The exchange received Musinsa’s preliminary listing application and will rigorously evaluate its business stability and corporate governance. Successful listings of major firms help boost total market liquidity.
• Nuclear Power Companies: With 8 large-scale nuclear power units included in US investment reviews, momentum for nuclear tech exporters is rising. Joint US-Korea global nuclear initiatives offer significant long-term upside.

③ Maeil Business - Summary

Reports focused on President Lee’s attendance at the Lumière Summit in France promoting film tax incentives, along with geopolitical reactions and seasonal weather impacts.

• 🔹 [Film Industry Incentives]: President Lee Jae-myung indicated plans to expand tax incentives for film investments during his visit to France.
• 🔹 [Geopolitical Tensions]: North Korea expressed opposition to joint Freedom Edge military drills, pledging responsive measures.

• Korean Film Production & Investment Companies: President Lee’s commitment to expanded film tax incentives raises expectations for improved production funding. Greater tax relief is expected to spur new creative project investments.
• Tuna Processing & Seafood Distributors: Research revealing parasites in Brazilian skipjack tuna highlighted the need for stricter seafood safety inspections. Companies maintaining rigorous quality standards stand to gain consumer trust.
• Japan Tourism & Travel Agencies: Record rainfall and emergency disaster warnings in eastern Japan are causing temporary caution regarding Japan travel demand. Agencies are closely monitoring safety conditions and booking trends.
• Fall Apparel & Fashion Companies: Widening day-to-night temperature gaps of around 15°C are boosting demand for light autumn outerwear. Fashion retailers are launching active seasonal promotional campaigns to capture this demand.

Top 5 Key Companies of the Day

1. Samsung Electronics: Experiencing a powerful industry boom as memory chip inventories fall to a mere 10 days. Robust global demand for AI memory and server components is accelerating its top-line and bottom-line earnings recovery.
2. SK Hynix: Alongside Samsung, SK Hynix is operating at historical inventory lows, dispelling peak-out concerns. Its technological edge in high-bandwidth memory continues to drive premium margins and market confidence.
3. Musinsa: Officially applied for a KOSPI listing review to benchmark its corporate value as Korea’s premier fashion platform. A successful IPO will secure significant expansion capital for its international growth strategy.
4. Korea Exchange: Reviewing major IPO candidates like Musinsa to drive new listings on the main KOSPI board. Through thorough regulatory screening, it aims to safeguard investors while boosting market-wide equity liquidity.
5. Encinal Gas Power Plant & Energy Consortium: Positioned at the forefront of Korea’s $350 billion US investment initiative with the Texas gas power plant project. As bilateral energy cooperation accelerates, the consortium anticipates substantial long-term project orders.

Source & Disclaimer

• Source: Naver Pay Securities, Yonhap News Economy, Maeil Business News
• This content represents a personal opinion and is for reference only.