SK Hynix Shares Fall as Big Rally Draws Ban on Margin Trading

SK Hynix Inc. fell after South Korea’s main bourse issued a higher-level warning on investing in the stock, following strong gains sparked by expectations of a listing in New York.

The action calls attention to a market running hot on artificial intelligence euphoria and a government campaign to lift stock valuations. The benchmark Kospi is up 72% so far this year, beating most global peers.