CAIRO- Egypt Saturday named Khaled Seri Siam as the new chief of its stock exchange. He is replacing Maged Shawki. Siam, who will take the new post as of July 15, previously serrved as the deputy chairman of Egypt's Supervisory Financial Authority and the deputy chairman of the Noney Market Authority. Minister of Economy Mahmoud Mohieddin said that Shawki left his post upon his request and was not ousted.