Samsung Electronics is trading 3.46% down at $4890.00, driven by several factors: * Investor selling after buying to qualify for the record quarterly dividend. * Reports of slowing AI model development by OpenAI, raising concerns about future demand for advanced chips. * The nearing completion of the company's share buyback program, removing a source of stock support. * Broader market pressures from rising U.S. Treasury yields, higher oil prices due to Middle East uncertainty, and general weakness in Korean equities.