The benchmark Taiex Index gained 0.5 percent to 7,700.95. The gauge has advanced 3 percent this week, the biggest jump since in three months.
Inotera Memories Inc. (3474) (3474 TT) jumped 3.9 percent to NT$8.31, the highest close since April 2. April sales totalled NT$3 billion, the highest in eight months.
Nanya Technology Corp. (2408) (2408 TT) surged 6.9 percent to NT$2.31, the steepest gain since March 23. April sales were NT$3.41 billion, the highest in 11 months.
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