ASIA MARKET OPEN | KOSPI Opens 1.82% Lower, Sidecar Triggered as Losses Deepen; Hang Seng Opens up 397 Points

What happened

South Korea’s KOSPI opened down 1.82% at 5,580.09 and later fell 4.67% to 5,418.15. The Korea Exchange then activated a sell-side sidecar, which suspended program trading in KOSPI-listed shares for five minutes. The article links the decline to concerns about tighter regulation of AI data centers.

Confirmed

Global impact / market context

The five-minute pause interrupted automated program trading, but it did not stop other trading or reverse the index’s decline. If concerns about tighter AI data-center rules persist, they could weigh on investor expectations for related companies’ future spending and earnings; the article does not quantify that exposure.

Analyst inference

The regional picture was mixed: Hong Kong’s Hang Seng opened higher, while Japan’s Nikkei later turned lower and Taiwan’s TAIEX losses widened. South Korea’s sharp fall stood out, with declines in Samsung Electronics and SK Hynix alongside the index; the article provides no broader market cause beyond AI regulation concerns.

Confirmed

What to watch

1. Whether the KOSPI stabilizes after the five-minute program-trading pause, and whether declines in Samsung Electronics and SK Hynix continue or ease. Analyst inference
2. Whether officials or companies provide details on possible tighter rules for AI data centers, including any implications for planned construction or operating costs. Analyst inference
3. Whether South Korea’s exchange activates another sell-side sidecar; the reported trigger suspended program trading in KOSPI-listed shares for five minutes. Confirmed

Evidence

• binance.com