South Korea’s benchmark stock market index, the KOSPI, has entered bear-market territory after falling more than 20% from its record closing level reached in late June. The sharp decline has been driven mainly by heavy selling in semiconductor stocks, concerns over the future of the artificial intelligence boom and growing worries about risky investment products linked to individual shares.
The KOSPI closed at 7,246.79 after dropping 5.35% in a single trading session. At one stage, the market decline was even sharper, with investors reacting quickly to losses in major chip companies and uncertainty around whether the rapid growth in artificial intelligence-related earnings can continue.
A bear market is generally defined as a fall of 20% or more from a recent market peak. The KOSPI had reached a record closing level of 9,114.55 on June 22, supported by strong investor interest in South Korean semiconductor companies. However, the rapid rally was followed by equally rapid selling, showing how quickly market sentiment can change when expectations become uncertain.
South Korea is one of the world’s most important semiconductor-producing countries. Its technology companies play a major role in the global supply of memory chips, advanced electronics and components used in artificial intelligence systems, data centres, smartphones and computers.
Because of this, the performance of South Korea’s stock market is closely linked to the outlook for companies such as Samsung Electronics and SK Hynix. Both companies have benefited from growing global demand for high-performance memory chips used in AI infrastructure.
However, investors have recently become concerned that the strong earnings expectations for chipmakers may already be reflected in share prices. When investors believe that a company’s stock has risen too quickly, they may sell shares to lock in profits. This is known as profit-taking.
The recent decline was also linked to changing views about the global AI industry. Artificial intelligence has been one of the biggest drivers of technology investment in recent years. Companies around the world have spent heavily on data centres, advanced processors, cloud computing and AI software.
This spending has created strong demand for memory chips and other semiconductor products. South Korean companies have been among the major beneficiaries because of their leadership in high-bandwidth memory, a type of chip used in advanced AI systems.
But markets often become volatile when investors begin asking whether growth can continue at the same speed. Even when companies report strong profits, stock prices can fall if investors expected even better results.
Samsung Electronics had recently forecast a major increase in operating profit, but its shares still faced selling pressure. SK Hynix also saw its share price fall sharply as investors reassessed the future outlook for chip demand.
The decline in major semiconductor shares had a strong effect on the KOSPI because technology companies hold a large weight in the index. When large companies fall, they can pull the entire market lower even if some other sectors remain stable.
The South Korean government and financial regulators have responded by saying they will closely monitor risks linked to market volatility. Finance Minister Koo Yun-cheol met with senior economic policymakers, including the central bank governor and financial regulators, to discuss the situation.
Officials said the market had been affected by foreign and institutional selling, portfolio rebalancing and changing expectations around the AI sector. Foreign investors play an important role in South Korea’s stock market, and their decisions can have a major impact on daily trading.
Portfolio rebalancing happens when large investors adjust their holdings after a stock or sector rises strongly. For example, if semiconductor shares become a very large part of an investment portfolio, investors may sell some shares and move money into other sectors to reduce risk.
The government is also concerned about the growth of leveraged exchange-traded funds linked to individual stocks. Leveraged ETFs are investment products designed to increase gains when a share price rises, but they can also increase losses when the market falls.
These products can make market movements more extreme because investors may be forced to sell quickly when prices decline. South Korea’s Financial Supervisory Service has said it will examine the impact of single-stock leveraged ETFs and may consider stronger oversight of how such products are marketed.
The Bank of Korea has also warned that leveraged products can create one-sided trading and excessive concentration in certain stocks. If too many investors place money into the same company or sector, a sudden fall can become much more severe.
The latest KOSPI decline has raised questions about whether South Korea’s market can recover quickly or whether the sell-off will continue. Much will depend on the next earnings reports from semiconductor companies and global demand for AI-related technology.
South Korea’s economy has benefited from strong exports of chips, electronics and technology products. Semiconductor exports are especially important because they bring foreign currency into the country and support jobs, investment and industrial growth.
If global AI demand remains strong, South Korean chipmakers may continue to benefit over the long term. But in the short term, investors are likely to remain cautious because of the sharp rise and fall in technology shares.
The market decline also affects ordinary investors. Many South Koreans invest in shares directly or through pension funds, mutual funds and exchange-traded products. When markets fall sharply, households may become more cautious about spending and investment.
A weaker stock market can also affect business confidence. Companies may delay expansion plans if they believe economic uncertainty is increasing. However, a stock-market correction does not always mean that the wider economy is entering a recession.
South Korea’s government will likely focus on preventing panic and ensuring that financial markets continue to function normally. Officials may also watch the value of the Korean won, foreign investment flows and the performance of banks and financial institutions.
The KOSPI’s fall into bear-market territory is a reminder that high-growth sectors can also carry high risk. The AI boom created strong optimism around South Korean chip companies, but the latest sell-off shows that investors are now demanding clearer evidence that earnings growth can continue.
For now, attention will remain on semiconductor stocks, AI investment trends and the response from regulators. The next few weeks could be important in deciding whether the KOSPI stabilises or faces further pressure.
South Korea remains a major global technology power, and its chip industry continues to be central to the country’s economy. But the recent market decline has shown that even strong industries can face sudden uncertainty when expectations become too high.