The KOSPI and Kosdaq indexes are displayed on the electronic board at the dealing room of Hana Bank headquarters in Seoul, Thursday.

KOSPI closed at 7,815.59, up 606.64 points, or 8.42 percent, from the previous session.

Yonhap The benchmark KOSPI staged a strong rebound Thursday, rising more than 8 percent in a single session on the back of a labor agreement at Samsung Electronics and Nvidia’s better-than-expected earnings results.

The index opened at 7,486.37, up 277.42 points, or 3.85 percent, and extended gains throughout the session to close at 7,815.59, up 606.64 points, or 8.42 percent.

KOSPI had briefly surpassed the 8,000 mark intraday on May 15 before plunging amid heightened volatility.