[Digital Today reporter Oh Sang-yup (오상엽)] The KOSPI broke above 5,100 for the first time, and the Kosdaq also rose above 1,100.

On Jan. 28, the KOSPI opened at 5,145.39 and immediately moved above 5,100. It comes after the KOSPI posted its first-ever close above 5,000, based on the previous session's close of 5,084.85. As of 9:20 a.m., it is up 68.54 points, or 1.35 percent, at 5,153.39.

The KOSPI's sharp rise is led by memory semiconductor companies. SK Hynix broke above the 800,000 won level the previous day and is holding gains at 811,000 won, up 1.38 percent.

Samsung Electronics also moved above the 160,000 won level on the day. Both chipmakers are set to announce 2025 fourth-quarter results on Jan. 29, and market expectations are high.

Most top market-cap shares are also rising. LG Energy Solution is up 9.61 percent, Hyundai Motor 2.05 percent, Hanwha Aerospace 2.85 percent, SK Square 2.11 percent and Kia 0.39 percent, showing little concern despite tariff threats from the Trump administration.

The Kosdaq is also up 26.05 points, or 2.41 percent, from the previous session at 1,108.63. The Kosdaq's move above 1,100 is due to expectations for government policy and sector rotation in biotech, robots and secondary batteries.