Institutions and brokerage funds, Admiralty and Securities, are actually subordinate units under the national financial system, which mobilize the stock index through stock index futures. That is to say, the stocks bought by brokerage funds of major institutions are basically the heavyweights of the component index (this is also the pre-selected constituent stocks, such as PetroChina, a bank insurance brokerage), and the so-called big blue chips are all linked to stock index futures, thus realizing the method of manipulating the broader market as long as the stock index futures are manipulated. Achieved the so-called four to two to one thousand pounds. As long as you control 10% of the stock, you can control the index of the broader market, and it is a pleasure to pull up and down every day. This is the so-called band, K-line, which is artificially manipulated, so retail investors basically lose more and win less. If they win the index and lose money, it is better to persuade them not to go!