On August 18, SK hynix fell 5.33% in regular trading, trading at $162.775/share, with turnover of $735 million. The memory chip sector saw broad-based selling as profit-taking pressure intensified following a multi-day rally.

The stock had surged in prior sessions after SK hynix Chairman Chey Tae-won warned that next year would bring the most severe memory shortage, with all customers demanding nearly double their usual supply. The company also announced a $720 billion expansion plan for AI memory capacity in Korea and the US. However, with short-term cumulative gains elevated, multiple Korean brokerages have cut SK hynix target prices by approximately 30%, fueling concerns that the memory cycle may be peaking. Additionally, Korean retail investors purchasing SK hynix ADRs at a roughly 10% premium and heavily buying leveraged semiconductor ETFs have been flagged by analysts as a speculative overheating signal.

The broader semiconductor sector declined in tandem, with Marvell Technology down 5.6%, Intel down 4.48%, Micron Technology down 4.12%, Advanced Micro Devices down 3.47%, and NVIDIA down 1.83%.

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