The benchmark Korea Composite Stock Price Index(KOSPI) broke the four-thousand mark for the first time on Monday, with the U.S. and China having agreed on the framework for a trade deal, and Washington expected to cut its key interest rate.

The KOSPI jumped 101-point-24 points, or two-point-57 percent, on Monday to close at four-thousand-42-point-83.

The index surpassed the four-thousand mark just four months after breaking the three-thousand mark on June 20. 

The tech-heavy KOSDAQ gained 19-point-62 points, or two-point-22 percent, to close at 902-point-70, recovering to the 900 mark after some 19 months. 

Net purchases by foreign investors led the surge after the S&P 500, Dow Jones and Nasdaq Composite all climbed last Friday.