The KOSPI index closed slightly lower at 8,394 on Monday, while the KOSDAQ surged approximately eight percent [1].

This divergence highlights a volatile day for South Korean equities, where heavy losses in the semiconductor sector were countered by aggressive buying in smaller-cap stocks and government policy expectations.

The KOSPI opened at 8,334 and hit an intraday low of 8,127 [1]. Although the index briefly climbed above 8,500 and shifted toward a gain in the late session, it ultimately finished with a 0.2% decrease [1].

Sector weakness was led by tech giants. Samsung Electronics fell 4.86% to 323,000 KRW, and SK Hynix dropped 1.68% to 2,628,000 KRW [1]. Analysts said the decline was due to a drop in U.S. semiconductor stocks and rumors regarding a delayed listing for OpenAI [1].

"Samsung Electronics fell 4.86% to 323,000 won, and SK Hynix fell 1.68% to 2,628,000 won," said YTN reporter Yoon Tae-in [1].

Despite the semiconductor slump, the KOSPI's decline was partially offset by the start of a public hearing for three government mega-projects [1]. Meanwhile, the KOSDAQ experienced a significant jump, driven by the activation of a buying side-car during the early session [1].

"The KOSPI, which started the day lower, turned upward in the latter half of the session, but ultimately ended slightly lower at 8,394," said a YTN anchor [1].

The KOSPI index closed slightly lower at 8,394 on Monday, while the KOSDAQ surged approximately eight percent.

The split performance between the KOSPI and KOSDAQ reflects a market caught between global AI uncertainty and domestic policy optimism. While the KOSPI remains heavily sensitive to the valuation of semiconductor giants and U.S. tech trends, the KOSDAQ's surge suggests a strong appetite for risk among smaller-cap investors, potentially amplified by the government's mega-project initiatives.