SK hynix shares jumped more than 9% early on the 11th, breaking through "1.8 million-nix." Samsung Electronics also topped 280,000 won intraday, setting a record high.
As of 9:06 a.m. that day, SK hynix stock was trading at 1,843,000 won, up 9.31% (157,000 won) from the previous session.
Samsung Electronics was also up 5.96% (16,000 won) at 284,500 won.
SK Square, the intermediate holding company, was up 7.19% (79,000 won) from the previous session at 1,177,000 won.
The rally appears to reflect continued tailwinds and positive outlooks for the semiconductor sector. Over the weekend, the Philadelphia Semiconductor Index surged 5.5%, and Intel and Micron jumped 13.96% and 15.49%, respectively.
Kim Young-geon, an analyst at Mirae Asset Securities, said, "It appears that long-term supply contracts are being signed across memory manufacturers, including Samsung Electronics and SK hynix," and noted, "With stable capital policies based on earnings visibility, the medium- to long-term return on equity (ROE) is likely to remain higher than in past cycles."