What is China A and China B?

Written by Editorial Team | Last Updated: August 2026

In the context of the Chinese equity markets, "A Shares" and "B Shares" refer to different classes of stock. A Shares are securities of companies incorporated in mainland China that are traded on the Shanghai or Shenzhen stock exchanges. Historically, these were restricted to domestic residents of the People's Republic of China, although access has since expanded through mechanisms like Qualified Foreign Investors (QFIs) and the Stock Connect programs. B Shares are also securities of companies incorporated in mainland China and traded on the Shanghai or Shenzhen stock exchanges; however, historically, these were denominated in foreign currencies (such as U.S. or Hong Kong dollars) and were primarily targeted at foreign investors. While both classes represent equity in Chinese firms, they differ in terms of regulatory accessibility, the currency of denomination, and the participant base permitted to trade them within the domestic Chinese financial system.

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