Samsung Electronics is trading 4.24% up now at $4224 after HBM4 production yield reached approximately 80%, an industry-defined “golden yield.”

  • The improvement came roughly six months after mass production began, ahead of its original year-end target.
  • The milestone supports higher output and profitability as demand for AI memory remains strong.
  • Seoul Economic Daily reported the production ramp, TrendForce corroborated the yield improvement, and major U.S. indices were essentially flat.