The benchmark KOSPI extended its record-breaking rally on Wednesday, rising more than 1% to above 5,100 and setting a fresh all-time high, as broad-based gains across key sectors outweighed renewed US tariff threats. Chipmakers led the advance, with index heavyweights Samsung Electronics and SK Hynix extending gains of more than 1%. Other notable gainers included giant battery maker LG Energy Solution, which surged over 7%, as well as automakers Hyundai Motor (+2.4%) and Kia Corp (+0.5%). Meanwhile, the Trump administration is urging South Korea to fully implement its six-month-old trade agreement to avert tariffs rising to 25%. US officials say Seoul has made limited progress, pointing to delays in ratifying the deal and enacting digital services legislation. The US Trade Representative has already held talks with South Korean counterparts, with further discussions scheduled in Washington, as President Trump signals the dispute could be resolved swiftly.