(Bloomberg) -- South Korean stocks climbed Friday, rebounding from steep losses earlier this week, as major technology firms' spending plans refueled optimism on the artificial intelligence trade. Most Read from BloombergThe benchmark Kospi rose as much as 14%, the most on record. The benchmark index tumbled 17% over the previous three sessions on concerns over rising debt levels at the world's biggest tech firms and a threat of Chinese competition. Investors drew comfort from Chey's purchase of 3,620 SK Hynix shares in the open market, his first direct personal investment in the chipmaker. Most Read from Bloomberg Businessweek©2026 Bloomberg L.P.