Trade in Ezz Steel, Egypt's largest steelmaker, has been suspended until its ownership and financial position are clarified, the bourse said on Wednesday.
Chairman Ahmed Ezz, who was a top official in ousted president Hosni Mubarak's party, is now being investigated for graft. He has been detained since 17 February pending trial on suspicion of squandering public funds.
The stock exchange requested disclosure of assets linked to ongoing investigations, it said in a statement. Ezz Steel and Amer Group are two eminent companies on which trade of shares has been suspended.