BiyaPay supports stock trading in the following US stock markets, but does not support OTC (over the counter market) trading.

• NYSE (New York Stock Exchange): The world's second largest exchange, with about 2,800 companies listed here, with a total market value of about $15 trillion.
• NASDAQ (NASDAQ Bourse): A large electronic network-based market with about 5,400 companies listed, the largest number of US Listed Companies and the largest stock trading volume.
• AMEX (US Stock Exchange): The third largest bourse in the US, offering trading of stocks, options and derivatives, focusing on small and medium-cap companies.
• PK (Pink Sheet Market): Also known as the Pink Sheet Trading Market, it is the primary quotation form of the US over-the-counter trading market and is now the bottom-level quotation system of NASDAQ.