This photo, taken Thursday, shows the trading room of Hana Bank in Seoul as South Korean stocks soared by more than five percent on a tech rally driven by Micron's earnings report. Photo by Yonhap

South Korean stocks soared by more than 5 percent Thursday, briefly topping the 9,000-point level again, driven by a tech rally ignited by U.S. chip giant Micron Technology's expectation-beating earnings report. The Korean won fell against the U.S. dollar.

The benchmark Korea Composite Stock Price Index (KOSPI) gained 459.28 points, or 5.42 percent, to close at 8,930.30, following a 3.26 percent gain the previous day.

The index briefly topped the 9,000-point threshold, rising as high as 9,044.04.

Finishing at an all-time high of 9,114.55 on Monday, the KOSPI has remained in the 8,000-point range since it dived 9.99 percent Tuesday.