Regulations Governing the Conduct of Securities Trading Margin Purchase and Short Sale Operations by Securities Firms Article 15

In conducting securities margin purchase and short sale business, the total amount of margin purchases that a securities firm provides for any given type of securities may not exceed 10% of its net worth.In conducting securities margin purchase and short sale business and conducting securities borrowing and lending business, the combined total amount of short sales and loans that a securities firm provides of any given type of securities may not exceed 5% of its net worth.If a securities firm is concurrently operated by a financial institution, the net worth referred to in the preceding two paragraphs shall be calculated based on the specially allocated operations capital.
中文原文 證券商辦理有價證券買賣融資融券管理辦法第15條
證券商辦理有價證券買賣融資融券,對每種證券之融資總金額,不得超過其淨值百分之十。
證券商辦理有價證券買賣融資融券與辦理有價證券借貸業務,對每種證券融券與出借之總金額,合計不得超過其淨值百分之五。
證券商由金融機構兼營者,前二項規定之淨值,改按指撥營運資金計算。

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