How to Invest on the Johannesburg Stock Exchange South Africa is far and away the most economically developed of African states, and, as such, will likely be the continent’s economic gateway for the foreseeable future. The Johannesburg Stock Exchange (“JSE”) located at 1 Exchange Square, 2 Gwen Lane, Sandton, Johannesburg, South Africa. The JSE offers secure, efficient primary and secondary capital markets across a diverse range of securities, supported by our post-trade and regulatory services. South Africa: Nedbank Online Trading and Sanlam iTrade. The Johannesburg Stock Exchange (JSE) is the largest stock exchange in Africa by market capitalization. ETFs and Mutual Funds .