Seoul shares soared Monday, with the benchmark Korea Composite Stock Price Index (KOSPI) surpassing the 4,000 mark for the first time, driven by optimism over a comprehensive U.S.-China trade deal and strong gains in technology stocks.

Oil prices climbed after President Donald Trump’s administration indicated a willingness to reach an agreement with China to ease renewed trade tensions between the world’s two largest oil consumers.

The United States and China are close to finalizing a major Boeing aircraft agreement, which some observers say could become a centerpiece of a broader trade deal.