MagnaChip Semiconductor is trading 5.39% down now at $2.28 after its November 4 third-quarter report showed gross margin of 14.0%, below the 17%–19% guidance range. - Revenue was $44.0 million; Q4 gross-margin guidance fell to 10%–12%. - Semiconductor-sector weakness is also weighing on shares amid concerns tighter data-center rules could slow investment. - The stock fell 4.37% in the prior session; trading volume was not provided.