Quantitative Research

TWSE Short Interest Weekly (Sep 18th): Shin Kong Financial, Nan Ya Plastics, Global Unichip, UMC

18 Sep 2026 By Ke Yan, CFA
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Abstract: We analyzed TWSE short interest for stocks with market cap of at least USD 100m as of September 18th. Aggregated short interest was USD 41,461m, up 4.7% from USD 39,610m a week prior, outpacing the TWSE index which rose 2.2% over the same period. The largest weekly increases in short value were in Winbond Electronics (+USD 208m), Nan Ya Plastics (+USD 202m), and Global Unichip (+USD 201m). The largest decreases were in LARGAN Precision (-USD 272m) and Wistron (-USD 251m). By total short value, Innolux (USD 1,215m), TSMC (USD 1,193m), and Wistron (USD 1,152m) ranked as the most shorted names.

Nan Ya Plastics (1303 TT) Winbond Electronics (2344 TT) Shin Kong Financial (2888 TT) UMC (2303 TT) Global Unichip (3443 TT)

Highlighted Stocks

Nan Ya Plastics, Winbond Electronics, Shin Kong Financial, UMC, Global Unichip

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