KOSPI is displayed in the dealing room of Hana Bank in Seoul, Friday.

The benchmark index closed at 6,595.45, up 17.91 percent from the previous session.

Yonhap KOSPI surged nearly 18 percent on Friday to reclaim the 6,500 level, posting record gains in both percentage and point terms as chip stocks staged a dramatic rally.

The benchmark closed at 6,595.45, up 17.91 percent from the previous session.

It jumped immediately after the open, triggering a buy-side sidecar at 9:06 a.m., and extended gains through the session.