Fraudsters leveraged the KOSPI’s record-breaking rally and subsequent market downturn to target inexperienced traders. Criminal groups frequently impersonated legitimate brokerage analysts, placing links beneath viral videos on platforms like TikTok to lure victims into private Naver Band groups. Once inside these closed channels, scammers used fake testimonials and fabricated trading apps to promise returns as high as 600%.
In section Cryptocurrency
South Korean retail investors lose $250 million to stock-tip fraud
South Korean retail investors suffered approximately $250 million in losses during the first half of 2026 as fraudulent stock-tip chatrooms exploited volatility in the KOSPI index. Police opened 3,506 investigations into schemes involving 336 billion won, marking a 19.8% increase in total financial damage compared to the previous year.
In one significant case, Seoul police arrested ten suspects in June for a Cambodia-based operation that defrauded 59 investors of 9.9 billion won. The network employed a tiered structure of callers and fake investors to build credibility before disappearing with the victims' capital. The Financial Services Commission launched a nationwide prevention campaign in September, targeting the spread of AI-generated misinformation and the proliferation of fake brokerage software. While platforms like Naver have pledged to strengthen monitoring systems, authorities warn that the high volume of cases—which does not reflect the total number of individual victims—remains a persistent threat to retail participation in the country's financial markets.
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