Quantitative Research

TWSE Short Interest Weekly (May 1st): CTBC Financial, Winbond Electronics, King Yuan Electronics

01 May 2026 By Ke Yan, CFA
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Abstract: We analyzed TWSE short interest data as of May 1st, covering stocks with market capitalization of at least USD 100m. Aggregate short interest was USD 39,887m, up 15.6% from USD 34,494m a week prior, while the TWSE index was flat over the same period. The largest short position by value was Wiwynn (6669 TT) at USD 1,657m, followed by UMC (2303 TT) at USD 1,397m and Asustek Computer (2357 TT) at USD 1,043m. The biggest weekly increases in short value were led by Wiwynn (+USD 708m), King Yuan Electronics (2449 TT, +USD 503m), UMC (+USD 443m), CTBC Financial (2891 TT, +USD 425m), and Winbond Electronics (2344 TT, +USD 371m). On the covering side, Alchip Technologies (3661 TT) saw the largest short reduction at -USD 316m, followed by Wistron (3231 TT) at -USD 289m.

King Yuan Electronics (2449 TT) Cathay Financial (2882 TT) Winbond Electronics (2344 TT) CTBC Financial (2891 TT) ASE Industrial (3711 TT)

Highlighted Stocks

King Yuan Electronics, Cathay Financial, Winbond Electronics, CTBC Financial, ASE Industrial

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