From stock euphoria to panic: South Korea investors face painful market fallout

South Korea’s push to create a more dynamic and globally competitive stock market has instead exposed the risks of aggressive retail speculation, leaving investors facing substantial losses and raising questions about the country’s financial market reforms.

The KOSPI benchmark has fallen about 30% from its June 19 peak, according to Reuters, dealing a political setback to President Lee Jae Myung’s government and intensifying scrutiny of an investment culture that encouraged retail investors to take on increasingly complex and leveraged products.

The sell-off has also raised questions about South Korea’s ambitions to achieve developed market status, as authorities confront the consequences of extreme retail trading activity.


Read more: Global Market: KOSPI gains on chip boost; foreigners turn net buyers

From market euphoria to investor trauma

The market decline has been particularly painful because it followed a period of extraordinary optimism. Retail participation surged as investors chased gains in Korean technology stocks, particularly semiconductor giants Samsung Electronics and SK Hynix.

Investment-related content also became increasingly popular, reflecting the broader enthusiasm surrounding domestic equities. Reuters reported that financial YouTuber Jeon Suk-jae, whose channel has millions of subscribers, had seen investor sentiment shift sharply from euphoria to gloom as the market reversed.

The psychological consequences have extended beyond financial losses. Demand for psychiatric assistance related to stock market stress has increased, while authorities have also dealt with incidents involving investors who blamed financial losses on others.

Push to end the Korea Discount

President Lee took office intending to reduce the so-called ‘Korea Discount’, which refers to the tendency for South Korean companies to trade at lower valuations than comparable businesses elsewhere because of concerns about corporate governance, shareholder rights and the influence of family-controlled conglomerates.

As part of efforts to make the domestic market more sophisticated, regulators considered introducing products that were already widely available to Korean investors trading overseas.

Single-stock leveraged exchange-traded funds were eventually launched on May 27. Reuters reported that these products use derivatives to magnify the daily performance of individual stocks, potentially generating much larger gains while also exposing investors to significantly greater losses.

Concerns were raised internally over whether domestic investors fully understood the risks. Despite those concerns, the products were approved, with investors required to complete an hour-long training course and meet a minimum deposit requirement.

The presidential office and economic ministries said they had reviewed the introduction of the products after assessing the associated risks. The Financial Services Commission also said it had comprehensively considered various risks during the approval process.

Leverage amplified the market boom

The introduction of leveraged products coincided with an extraordinary rally in Korean stocks.

The global artificial intelligence boom boosted demand for memory chips, helping Samsung Electronics and SK Hynix surge in value. The gains encouraged more retail investors to participate, while financial influencers and market commentators helped turn stocks into a national obsession.

At the same time, investors increasingly borrowed money to increase their exposure. Margin loans for KOSPI investment jumped about 75% from the beginning of the year to roughly 30 trillion won by late June.

Margin loan balances reached a record 29.8 trillion won on June 24, according to the Korea Financial Investment Association.

The concentration of the Korean market in a handful of large technology companies also increased the risks. Samsung Electronics and SK Hynix together accounted for more than 53% of the KOSPI’s total value, meaning large moves in either stock could have an outsized impact on the benchmark.

Volatility sends shockwaves through investors

The market reversal became increasingly severe in early July. Reuters reported that the VKOSPI volatility gauge surged to 97.99, its highest level since data collection began in 2009.

A Citi client note estimated that retail investors had lost $38.7 billion on leveraged ETFs.

The speed of the reversal highlighted the dangers of leverage during a rapidly changing market. Investors who had borrowed money or used leveraged products to maximise gains during the rally faced substantially larger losses once share prices turned lower.

The financial damage was compounded by a perception among some households that conventional investment opportunities had become increasingly difficult to access amid widening wealth inequality.

Political pressure builds

The market collapse has created a difficult challenge for the Lee administration.

Reducing the Korea Discount remains a major economic objective, while the government also wants to attract foreign capital and persuade global index provider MSCI that South Korea has the market infrastructure and governance standards required for developed market classification.

However, the sharp rise in volatility has raised concerns among international investors about the stability of the domestic market.

Reuters reported that some analysts believe the turmoil could damage foreign perceptions of South Korean equities, even though measures designed to improve corporate governance remain broadly positive.

The government and financial authorities have responded by imposing tighter restrictions on individual investment in certain leveraged ETFs. Politicians have also faced pressure over policies that were seen as encouraging greater retail participation in risky products.

Investors turn more cautious

The fallout has changed investor behaviour. Some South Korean investors have turned back towards US markets, where demand for leveraged ETFs remains strong, according to Korea Securities Depository data.

The shift highlights the challenge facing policymakers. Encouraging retail participation and introducing sophisticated financial products can deepen domestic capital markets, but it can also expose inexperienced investors to substantial losses when markets reverse sharply.

Despite the recent decline, the KOSPI remains well above its October levels. Yet the experience has left some investors questioning whether they want to return to the domestic market.

Some long-time investors had suffered steep losses during the rout and were reconsidering their participation in Korean equities.

For policymakers, the episode could prompt a broader reassessment of how quickly financial market reforms should be introduced and what safeguards are needed when complex leveraged products become accessible to retail investors.

The immediate challenge is to restore investor confidence while preserving the longer-term goal of building a more transparent, competitive and globally integrated Korean stock market.

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