000660.KS saw a 5.61% surge to $2,919,000 yesterday, completing a multi-day rally driven by robust demand for AI-related high-bandwidth memory. - SK Hynix has overtaken Samsung Electronics to become South Korea's most valuable listed company, buoyed by its dominant position in the HBM market and strong earnings. - The company's significant profitability was highlighted by a recent Bank of Korea warning regarding massive employee bonuses, further boosting investor confidence.