There are big orders in the handicap, especially when the stock price falls back to the key technical price, the support of big orders is extremely firm, and then the operation form of upward collection is getting better and better, showing the main support.
There are many reasons for closing the board, which can be upward support or downward support.
The main support is mainly to maintain the confidence of investors, so that the majority of retail investors will not sell stocks crazily, thus reducing their own pull-up costs or slowing down the decline of stocks, and trying to prevent large floating losses. Because the dealer holds a large number of shares, in order to avoid excessive selling from his own interests, the dealer has to protect his own interests.
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When the national team takes over, it usually buys Chinese prefix to prevent speculators from taking advantage of loopholes, and it can also stabilize the market and prevent the purchased stocks from fluctuating greatly, such as PetroChina and Sinopec.