SK Hynix Flash Crash: Stock Momentarily Plunges 30% on Nextrade Platform
Key Takeaways
- •SK Hynix's stock briefly dropped approximately 30% in about two minutes on the Nextrade ATS during Thursday's pre-open session before rebounding.
- •A block deal executed on Nextrade caused the price dislocation, resulting in roughly $60 million worth of long positions being liquidated.
- •Nextrade is South Korea's first alternative trading system, launched in March 2025, and may have thinner order books compared to the established Korea Exchange.
- •SK Hynix is a key supplier of high-bandwidth memory chips for NVIDIA's AI accelerators, making it a critical player in the global AI hardware supply chain.
- •The flash crash is likely to intensify regulatory scrutiny of the ATS sector's risk controls for heavily traded technology stocks.
SK Hynix, one of South Korea's largest semiconductor manufacturers and the world's second-largest memory chipmaker, experienced a dramatic flash crash on the Nextrade alternative trading platform during the pre-open session on Thursday. The stock momentarily plummeted 30% over a span of approximately two minutes before recovering.
The sharp decline was triggered by a block deal executed on Nextrade, which caused the price to dislocate significantly from prevailing market levels. As a result of the sudden drop, long positions valued at approximately $60 million were liquidated in the brief window of the crash.
Nextrade is South Korea's first alternative trading system (ATS), launched in March 2025 to provide competition to the traditional Korea Exchange (KRX) by allowing off-exchange trading of listed securities. As a relatively new venue, its order books may not yet match the depth of the established primary exchange, potentially amplifying the price impact of large trades. Flash crashes on alternative platforms have been a recurring concern for regulators globally, as lower liquidity and thinner order books can magnify the effects of block deals.
SK Hynix, headquartered in Icheon, South Korea, is a major supplier of DRAM and NAND flash memory products globally. The company is also the dominant supplier of high-bandwidth memory (HBM) chips used in artificial intelligence computing, providing HBM3E modules for NVIDIA's AI accelerators. This positions SK Hynix as a critical node in the global AI hardware supply chain, and its shares are among the most heavily traded on the Korean market as a major KOSPI component.
This incident marks yet another flash crash event, adding to ongoing concerns about volatility and the stability of electronic trading systems. Regulators and exchange operators have previously implemented circuit breakers and other safeguards to mitigate the effects of sudden price dislocations, but alternative trading venues may operate under different risk controls compared to primary exchanges. The event is likely to intensify scrutiny of the nascent ATS sector in South Korea and whether its safeguards are adequate for high-volume stocks central to global technology supply chains.
The source article can be found at CNBC-TV18.
