Limit board: the limit board system originated from the early foreign securities market. It is a trading system that appropriately limits the fluctuation range of the price of each stock on the same day in order to prevent the trading price from soaring and plunging and curb excessive speculation. It is stipulated that the maximum fluctuation range of the trading price in a trading day is a few percent of the closing price of the previous trading day.

That is, the highest price and lowest price of the day's transaction are stipulated. In China A shares, the daily limit is generally 10%. Short position: refers to the state in which investors throw out all their own commodities (such as commodities, raw materials, stocks, futures, coins, etc.). ) and cash in hand, no goods.

The so-called short position refers to the situation that the customer's rights and interests in the investor's margin account are negative under some special circumstances. When the market situation changes greatly, if most of the funds in the investor's margin account are occupied by trading margin, and the trading direction is opposite to the market trend, it is easy to explode the position because of the leverage effect of margin trading. If short positions lead to losses, and they are caused by investors, investors need to make up for the losses, otherwise they will face legal recourse.