The Korea Exchange activated a sidecar suspending program sell orders after KOSPI futures plunged. SK hynix fell around 8% intraday, breaking below the 2-million-won mark, and the KOSPI lost more than 4%, the Kyunghyang Shinmun and Liberty Times reported.

The paradox of a hot Nasdaq debut

SK hynix ADSs closed their first Nasdaq session on the 10th at $168.01, up 12.76% from the $149 offer price. With one ADS equal to a tenth of a common share, the debut close stood 15.78% above the Seoul closing price of 2.18 million won.

In Seoul, the opposite unfolded: listing hopes were already priced in, profit-taking snowballed, and index rebalancing left a demand vacuum, analysts say.

Caution ahead of key U.S. data including June CPI further chilled sentiment. Brokerages cut target prices on major chip stocks, some issuing outright sell calls, while warnings mounted for leveraged-product investors.

Asia falls in tandem

The weakness spread beyond Korea, with the Nikkei down nearly 1,000 points, the Liberty Times reported. Valuation strain in the big tech names that led the chip-AI rally became the trigger for a region-wide pullback.

A third perspective: growing pains of dual listing

TSMC endured years of adjustment after listing ADRs in New York in 1997, ultimately broadening its global investor base. Seoul and New York pricing the same company differently may be a familiar rite of passage for dual listings — though critics counter that Korea's volatility-prone market earned its 'casino' jibe anew. For Chinese-diaspora investors straddling both markets, currency and premium gaps are now fresh variables.