Abstract: We analyzed the earnings revision of MSCI Taiwan index constituents for September 2026, with the index rising 3.9% from 2,064 to 2,144. The index 2026E EPS increased 2.3% month on month to NT$95.49 from NT$93.31, with 46 stocks revised up and 7 revised down. On index EPS impact, TSMC (2330 TT) led with +NT$0.27, followed by UMC (2303 TT) at +NT$0.22, Nanya Technology (2408 TT) at +NT$0.19, Quanta Computer (2382 TT) at +NT$0.19, and Phison Electronics (8299 TT) at +NT$0.17. On absolute EPS revision, the largest upgrades were UMC (+11.1%), Wiwynn (6669 TT) (+10.7%), and Formosa Plastics (1301 TT) (+8.53%), while the largest downgrades were China Steel (2002 TT) (-2.20%), Zhen Ding Technology (4958 TT) (-1.58%), and MediaTek (2454 TT) (-0.73%).
Zhen Ding Technology, Phison Electronics, Wiwynn, MediaTek, Hua Nan Financial, Fortune Electric
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