A dealing room display at Hana Bank in Seoul shows the won-dollar exchange rate, KOSPI and the closing prices of SK hynix and Samsung Electronics, Monday. KOSPI closed at 9,114.55, up 62.13 points, or 0.69 percent, from the previous session, setting a record high on a closing basis. SK hynix also overtook Samsung Electronics to become the No. 1 company by market capitalization on the benchmark index. Yonhap

SK hynix overtook Samsung Electronics to claim the top position on KOSPI by market capitalization on Monday, ending Samsung's reign of 25 years and seven months as the benchmark index's most valuable listed company.

KOSPI, meanwhile, edged higher to close above the 9,100 mark, setting a new record high on a closing basis.

According to the Korea Exchange, SK hynix recorded a market capitalization of about 2,080.38 trillion won ($1.35 trillion), surpassing Samsung Electronics’ 2,066.66 trillion won by about 13.72 trillion won on a closing price basis.

Samsung Electronics first claimed KOSPI's top spot by market capitalization on July 29, 1999, and had maintained its dominance uninterrupted since Nov. 21, 2000.