South Korea’s KOSPI index posted its steepest daily drop since April, falling nearly 11% on Tuesday and closing at 6,012.68. The sharp decline briefly triggered a trading halt and sent ripples across Asian markets, impacting risk assets such as Bitcoin.
Semiconductor stocks lead equity rout
Major chipmakers Samsung Electronics and SK Hynix were at the center of the sell-off, with Samsung Electronics dropping 13.4% and SK Hynix losing 9.7% during the session. Together, these two companies make up more than half of KOSPI’s total market capitalization, intensifying the index’s losses.
The market’s concerns centered on reports that China has accelerated domestic production of deep ultraviolet (DUV) lithography equipment. This technology is considered crucial for manufacturing advanced semiconductor chips, and greater Chinese capabilities could provide stiffer competition to established global suppliers, particularly those involved in AI hardware.
The downturn in South Korea spilled over into neighboring markets. Japan’s Nikkei 225 dropped 3.9%, while Taiwan’s Taiex closed 4.6% lower, as regional investors reacted to the sharp losses in semiconductor stocks.
Mini dictionary: Deep ultraviolet (DUV) lithography, a semiconductor manufacturing process using ultraviolet light to etch circuits onto silicon wafers, is critical for producing smaller, more advanced chips.
| Index/Asset | Daily Change (%) |
|---|---|
| KOSPI | -11% |
| Nikkei 225 | -3.9% |
| Taiex | -4.6% |
| Bitcoin | -2.8% |
| Ether | -3.6% |
Crypto market reaction
The broader cryptocurrency market also faced pressure, though declines were less severe than those in equities. Over the past 24 hours, global digital asset market capitalization dropped around 2%. Bitcoin lost 2.8%, while Ether fell 3.6%.
Market participants monitored the link between the performance of semiconductor stocks and digital assets. Throughout 2026, pronounced weakness in AI-focused equities has often coincided with a drop in broader risk assets such as cryptocurrencies, even when there is no clear crypto-specific catalyst.
Periods of volatility in major tech stocks have spilled into crypto markets, especially during sharp AI-related corrections.
Analysts pointed out that the KOSPI has been one of the most volatile leading equity markets this year. Options data has at times priced its risk profile at roughly double that of Bitcoin, a reversal of typical market perceptions.
South Korea’s influence on global crypto flows
South Korea plays an outsized role in global retail cryptocurrency trading volumes and is also a major market for leveraged retail tech equity products. When domestic tech funds and futures experience margin calls, many traders sell liquid crypto positions to meet their obligations.
Forced liquidations in South Korean exchange-traded funds and single-stock futures have therefore contributed to increased volatility in digital asset markets, creating spillover effects beyond the country’s borders.
Analysts cautioned that if the sell-off widens to include U.S. technology and semiconductor stocks, Bitcoin may face new tests at key technical support levels.
Outlook and potential impact
Investors are focused on upcoming earnings results from SK Hynix, scheduled for Wednesday, to gauge whether confidence in semiconductor stocks could recover, or if an extended sell-off in the AI supply chain will persist.
For now, digital assets have remained comparatively resilient relative to Asian equities, suggesting that many market participants still view the current move as a sector-driven shock rather than a broad-based risk-off event. However, this stance could shift rapidly if technology and semiconductor stocks in the United States show similar weakness.
