The stock balance is insufficient and short selling is not allowed. This means that there are insufficient stocks in the current stock account and cannot be traded.

Both the Shanghai and Shenzhen stock markets implement a T+1 trading system, and it is not possible to buy or sell on the same day. Although the stock account shows that there are stocks, the stocks bought that day cannot be sold. Short selling is the opposite of short buying. In theory, you first borrow money to sell, and then buy it back. Since the balance of stocks that can be traded in the investor's stock account is insufficient, the system assumes that the investor wants to perform short selling operations and rejects the investor's short selling request.

The content of this article comes from: China Law Publishing House's "Complete Knowledge of Legal Life Common Sense Series"