Securities Transaction Tax Act Article 2-2

In the case when a buy order and a sell order for a listed or OTC-listed stock are of the same kind and equal quantity, and are executed on the spot market through the same brokerage account on the same day during the period from April 28, 2017 to December 31, 2027, or in the case a securities firm buys and sells listed or OTC-listed stock of the same kind and equal quantity through the same account on the same day during the period from April 28, 2018 to December 31, 2027, the securities transaction tax shall be levied at the rate of 0.15% based on the transaction amount for each sell order, instead of applying the provisions set out in Subparagraph 1, Article 2.Transaction qualified for the tax rate described in the preceding paragraph shall be conducted according to the regulations and directions governing day trades of securities by the Financial Supervisory Commission, Taiwan Stock Exchange, and Taipei Exchange.
中文原文 證券交易稅條例第2-2條
自中華民國一百零六年四月二十八日起至一百十六年十二月三十一日止同一證券商受託買賣或自一百零七年四月二十八日起至一百十六年十二月三十一日止證券商自行買賣,同一帳戶於同一營業日現款買進與現券賣出同種類同數量之上市或上櫃股票,於出賣時,按每次交易成交價格依千分之一點五稅率課徵證券交易稅,不適用第二條第一款規定。
適用前項規定稅率之股票交易,應依金融主管機關、證券交易所、證券櫃檯買賣中心訂定之有價證券當日沖銷交易作業相關規定辦理。

English translation for reference only; the Chinese text prevails. Not legal advice.