Korea Stock Market (KRX) Today (August 13): A dramatic turnaround is sweeping through South Korea’s stock market as investors rush back into technology and semiconductor shares. On Thursday, August 13, 2026, the benchmark KOSPI jumped more than 4% during trading, extending a powerful rebound from its July lows and moving into technical bull-market territory. Heavy buying in chip giants Samsung Electronics and SK Hynix, stronger U.S. technology stocks overnight and renewed confidence in global artificial intelligence spending drove the rally.
The move marks a sharp reversal from the severe sell-offs that battered Korean stocks in July. Earlier volatility had pushed the KOSPI below 7,000, while Samsung Electronics and SK Hynix suffered steep losses as investors questioned the strength of the memory-chip cycle.
Korea Stock Market (KRX) Today (August 13): Why is the Korean Stock Market Up Today?
South Korea’s stock market is witnessing a powerful rebound on Thursday, August 13, with the KOSPI surging more than 4% as investors return to technology and semiconductor shares. The rally follows strong overnight gains in US technology stocks and renewed optimism that global companies will continue spending heavily on artificial intelligence infrastructure.
The biggest boost is coming from Samsung Electronics and SK Hynix, which have gained more than 5% and 7%, respectively, as demand expectations for memory chips improve. Easing concerns over US inflation have also strengthened global risk appetite, while reports of potential investment interest in South Korean chipmakers have added to the positive sentiment.
Korea Stock Market (KRX) Today (August 13): KOSPI Surges Over 4%
The KOSPI opened strongly on Thursday, gaining 2.96% at 6,773.92, before accelerating during the session. The index climbed as much as around 4.8%, with early trading taking it to the 6,800-plus level.
The rally extended the index’s recovery from its July 30 low to roughly 22%, placing it around the threshold generally used to define a technical bull market.
The scale of the rebound stands out because Korean equities had suffered extreme volatility only weeks earlier. The KOSPI previously plunged nearly 9% in a single session in July as semiconductor stocks collapsed, showing how quickly sentiment can change in the market.
KOSPI Performance
- KOSPI opening: 6,773.92
- Opening gain: +2.96%
- Intraday gain: Up to around +4.8%
- Trend: Technical bull-market territory
- Main catalyst: Semiconductor and AI-stock rebound
The latest move also reflects the importance of Samsung Electronics and SK Hynix to the broader index. The two companies have repeatedly driven major KOSPI swings because of their enormous market weight and exposure to the global memory-chip cycle.
Korea Stock Market (KRX) Today (August 13): KOSDAQ
The technology-heavy KOSDAQ also opened higher, although its advance remained much smaller than the KOSPI’s surge.
The index opened at 863.15 points, up 4.24 points, or 0.49%, according to Seoul Economic Daily.
The more modest opening gain shows how strongly today’s rally is concentrated in the large-cap semiconductor companies listed on the main KOSPI market.
KOSDAQ Performance
The KOSDAQ started the session in positive territory as investors followed the broader improvement in global technology sentiment. However, the secondary market did not match the scale of the KOSPI’s rally.
This divergence is important for investors because the latest recovery remains heavily dependent on major semiconductor stocks rather than representing an equally strong advance across every part of the Korean market.
Korea Stock Market (KRX) Today (August 13): Samsung Electronics Jumps Over 5%Â
Samsung Electronics became one of the major engines of Thursday’s rally.
Samsung Electronics shares jumped more than 5% during the session as investors returned to memory-chip and AI-related stocks. The company’s performance closely tracked the wider recovery in global semiconductor sentiment.
The stock’s strength also highlights how quickly the market narrative has changed. In July, Samsung Electronics suffered double-digit losses during the semiconductor sell-off, contributing heavily to the KOSPI’s decline.
Samsung Electronics official website
Samsung Electronics Share Price
- August 13 Performance: Around +5%
- Market Role: Major KOSPI heavyweight
- Key Driver: Recovery in global AI and memory-chip sentiment
The latest buying suggests that investors are again focusing on long-term AI infrastructure demand instead of the recent fears surrounding a possible peak in the semiconductor cycle.
Korea Stock Market (KRX) Today (August 13): SK Hynix Rallies Nearly 8%
SK hynix delivered an even stronger performance than Samsung Electronics.
SK Hynix shares climbed more than 7% during Thursday’s trading as investors aggressively bought memory-chip stocks. The company remains one of the world’s key suppliers of memory semiconductors used in AI infrastructure, making its shares particularly sensitive to changes in expectations for AI investment.
Reports on Thursday showed SK Hynix rising more than 7%, while Samsung Electronics gained more than 5%, helping drive the KOSPI’s sharp advance.
SK hynix official website
SK Hynix Share Price
- August 13 Performance: Around +7%
- Market Role: Major KOSPI semiconductor heavyweight
- Key Driver: Renewed AI-memory demand optimism
The stock has experienced extraordinary volatility in recent months. SK Hynix plunged more than 15% during the July semiconductor sell-off before participating in the subsequent recovery.
Korea Stock Market (KRX) Today (August 13) Performance
The broader Korean market is benefiting from several factors arriving at the same time.
1. AI Investment Sentiment Returns
Investors are once again showing confidence in the global AI trade. Expectations that major technology companies will continue spending heavily on data centres and AI infrastructure have strengthened demand expectations for memory chips.
That optimism has directly benefited Korean semiconductor leaders, particularly Samsung Electronics and SK Hynix.
2. Wall Street Provides a Strong Lead
Overnight gains in U.S. technology shares gave Asian markets an important boost. The positive performance encouraged investors to move back into technology and semiconductor stocks across the region.
Asian equities broadly benefited from renewed enthusiasm for AI and semiconductor companies.
3. U.S. Inflation Supports Risk Appetite
Easing U.S. inflation concerns have also helped improve investor confidence. A softer inflation outlook can reduce fears about tighter monetary policy and encourage investors to take more exposure to risk assets.
The latest Korean rally therefore reflects both a technology-sector recovery and a broader improvement in global risk sentiment.
4. KOSPI Recovers From July’s Shock
The scale of the rebound becomes clearer when compared with July’s sell-off. The KOSPI fell almost 9% on July 13, while Samsung Electronics dropped 10.7% and SK Hynix plunged 15.37%.
The sharp reversal shows how quickly semiconductor sentiment can change when global AI expectations shift.
Korea Stock Market (KRX) Today (August 13): Top Gainers
Large-cap technology and semiconductor companies dominated the leading gains.
- Samsung Electro-Mechanics: Around +13%
- SK Square: Around +10%
- SK Hynix: Around +7.7%
- Samsung Electronics: Around +5.2%
The figures underline the concentration of Thursday’s rally around companies linked directly or indirectly to the semiconductor cycle.
The strongest moves came from stocks that investors view as beneficiaries of renewed AI infrastructure spending.
Korea Stock Market (KRX) Today (August 13): Top Losers
Despite the broad market rally, several smaller KRX and KOSDAQ-listed companies recorded sharp declines.
Among the notable decliners reported in the supplied market data were:
- Nuin Tek: Around -26.9%
- Omnisystem: Around -25.5%
- Abion: Around -23.6%
- E8ight: Around -21.3%
- Pintel: Around -19.8%
- Labgenomics: Around -16.3%
- Hanjoo ART: Around -15.9%
- CMG Pharmaceutical: Around -15.1%
- Logis Mon: Around -15%
- Luxpia: Around -14.9%
These declines show that the broader market rally does not mean every Korean stock is participating. Capital is flowing much more strongly into large-cap technology and semiconductor names.
Korea Stock Market (KRX) Today (August 13): What Should Investors Know?
The biggest takeaway from Thursday’s session is the speed and concentration of the KOSPI recovery.
The index has moved from a severe July correction to a sharp AI-led rebound in a matter of weeks. However, the extreme volatility seen recently means investors should not assume that every rally will continue without interruption.
The semiconductor sector remains particularly sensitive to global AI spending, U.S. technology stocks, memory-chip prices, currency movements and interest-rate expectations. Korean market volatility has already demonstrated how quickly these factors can reverse investor sentiment.
The current rally also remains concentrated in a handful of heavyweight technology companies. That makes the KOSPI’s next move closely tied to the performance and outlook of Samsung Electronics and SK Hynix.
For now, however, the direction is clearly positive. The combination of stronger AI optimism, gains on Wall Street and renewed demand for Korean semiconductor shares has pushed the KOSPI into a powerful recovery phase.
