Kwamambala , sikhuthazeke khulu ngependulo ethokozisako evela ekorweni yangeqadi njengombana itjengiswe ngokuzimisela kuka-CEO wamakhampani ama-70 we Johannesburg Securities Exchange azimisele ukusebenzisana norhulumende ekuqalaneni nomraro wokutlhogeka kwamakghono .