Round-up of South Korean financial markets:South Korean shares notched a record closing high after a volatile session of trading on Tuesday, with technology firms leading the gains on hopes of AI cooperation ‌with Nvidia.The ⁠benchmark KOSPI ended up 13.11 points, or 0.15%, at 8,801.49, its highest closing level on record.The KOSPI rose as much as 1.7% before falling up to 3.3%. It turned higher again near the session close.South Korea's consumer inflation quickened in May to a more than two-year high, exceeding market expectations on high oil prices triggered by the Middle ⁠East conflict, ‌supporting the case for monetary tightening as early as next month.Nvidia CEO Jensen Huang hosted top South Korean tech ⁠executives on Monday, as he looks to deepen ties with key partners ahead of what he called an "incredibly busy" stretch for the AI boom.Chipmaker Samsung Electronics rose 3.3% to a record close, while e-commerce firm Naver jumped 3.3%. Home appliance maker LG Electronics gained 3.2%.Chipmaker SK Hynix lost 0.1%, while Hyundai Motor fell 2.8%."Today's volatility is a result of a tug-of-war between continued buying of ‌retail investors and selling of foreign investors in an overheated market," said Seo Sang-young, an analyst at Mirae Asset Securities.Of the total 924 traded issues, ⁠271 shares advanced, while 636 declined.Foreigners were net sellers of shares worth 6.6 trillion won ($4.35 billion), extending their selloff to an 18th straight session.The won was quoted at 1,518.5 per dollar on the onshore settlement platform, 0.37% lower than its previous close at 1,512.9.The most liquid three-year Korean treasury bond yield fell by 1.3 basis points to 3.774%, while the benchmark 10-year yield fell by 4.0 basis points to 4.127%. ($1 = 1,518.0500 won)