The Competition Commission on Wednesday referred a collusion case to the tribunal for prosecution against 17 banks, including three of South Africa's big banks.

The commission said in a statement it has been investigating a case of price-fixing and market allocation in the trading of foreign currency pairs involving the rand since April 2015. It has now referred the case to the tribunal for prosecution.

The banks are Bank of America Merrill Lynch International Limited, BNP Paribas, JP Morgan Chase & Co, JP Morgan Chase Bank NA, Investec Ltd, Standard New York Securities Inc, HSBC Bank Plc, Standard Chartered Bank, Credit Suisse Group; Standard Bank of South Africa Ltd, Commerzbank AG; Australia and New Zealand Banking Group Limited, Nomura International Plc, Macquarie Bank Limited, ABSA Bank Limited (ABSA), Barclays Capital Inc, Barclays Bank plc (Respondents).

The commission is seeking an order from the tribunal declaring that the respondents have contravened the Competition Act.

Further, the Commission is seeking an order declaring that the Bank of America Merrill Lynch International Limited, BNP Paribas, JP Morgan Chase & Co, JP Morgan Chase Bank N.A, Investec Ltd, Standard New York Securities Inc., HSBC Bank Plc, Standard Chartered Bank, Credit Suisse Group; Standard Bank of South Africa Ltd, Commerzbank AG; Australia and New Zealand Banking Group Limited, Nomura International Plc., Macquarie Bank Limited are liable for the payment of an administrative penalty equal to 10% of their annual turnover.