Samsung Electronics is trading 6.17% up at $4302 driven by a combination of positive news: - The company's HBM4 production yield reportedly reached approximately 80%, a "golden yield" milestone achieved roughly six months after mass production began and ahead of its year-end target. - Speculation that Singapore's sovereign wealth fund Temasek is considering a significant investment in Samsung, alongside expectations for massive shareholder returns, also fueled the rally. - These factors support expectations for more profitable AI-memory production and improved investor confidence.