SK Hynix and SoftBank Lead Asia Tech Selloff as US Semiconductor Losses Spread Overnight

The Quick Take

• SK Hynix and SoftBank shares tumbled Tuesday as Asia-Pacific tech stocks tracked a US semiconductor selloff.
• The Philadelphia Semiconductor Index fell sharply Monday on valuation concerns, transmitting losses to Seoul and Tokyo.
• SK Hynix, a key NVIDIA HBM3E supplier, saw outsized losses given its elevated AI-exposure premium in the current cycle.
• SoftBank's Vision Fund portfolio sensitivity amplified selling as investors rotated from high-multiple tech names.
• Nikkei semiconductor sub-index and Korea's KOSDAQ also declined in sympathy with the broader tech de-rating.

The overnight spillover from US semiconductor markets to Asian tech underscores how tightly coupled global chip equities have become in the AI infrastructure cycle. SK Hynix carries a particularly elevated risk premium given its dominant position supplying high-bandwidth memory to NVIDIA's H100 and B200 accelerators. Any re-rating of AI infrastructure spending expectations in US markets transmits almost instantaneously to Seoul and Tokyo, where supply-chain exposure is most concentrated among listed companies.

SoftBank's vulnerability reflects Vision Fund's deep AI and semiconductor portfolio, which has delivered outsized gains through 2026 but creates symmetric downside when sentiment reverses. With Vision Fund 2 holding positions across ARM, ByteDance-adjacent assets, and emerging AI infrastructure plays, any broad tech de-rating in the US directly pressures SoftBank's net asset value and its share price in Tokyo trading.

Forward signals are mixed. US semiconductor earnings season is underway, and cautious guidance on data-centre capex timing could extend the selloff. However, SK Hynix's HBM4 memory order backlog remains robust through mid-2027, providing fundamental support. Investors will watch the Philadelphia Semiconductor Index closely this week — recovery above the 20-day moving average would likely stabilise Asian tech names within one to two sessions.

Synthesized from 1 source.