[Margin Trading Balance Decreases by 1.688 Billion Yuan in Shanghai and Shenzhen Stock Exchanges] As of August 20, the margin trading balance of the Shanghai Stock Exchange was 1,352.436 billion yuan, a decrease of 1.22 billion yuan from the previous trading day; the margin trading balance of the Shenzhen Stock Exchange was 1,278.723 billion yuan, a decrease of 468 million yuan from the previous trading day; the total margin trading balance of the two exchanges was 2,631.159 billion yuan, a decrease of 1.688 billion yuan from the previous trading day.