The support of the national team can be simply understood as: whenever the market plummets and the popularity is dispersed, the funds of these state-owned enterprises will enter, so as to stabilize the confidence of investors and the development of the securities market.

National team fund is a term for investors, which generally refers to departments holding a large number of shares of listed companies, social security funds and large state-owned enterprises. Such as: central huijin, China Ministry of Finance, bank funds, securities firms, etc.

Under normal circumstances, the national team will not support the market at will, unless the stock market is very bad and the economy is seriously declining. Moreover, the entry or support of the national team is not for profit, but for maintaining the security and stability of the capital market.

There is also a kind of national team support that is supported by national policies. When the country announces a news to stimulate the stock market, many state-owned enterprises' funds will enter the stock market, so we often hear: bank stocks support, securities firms support and so on.

Securities are the general name of all kinds of economic rights and interests certificates, and also refer to specialized products, which are legal certificates used to prove that the holder enjoys certain rights and interests.

Securities mainly include capital security, currency securities and commodity securities. In a narrow sense, securities mainly refer to securities products in the securities market, including property market products such as stocks, debt market products such as bonds, and derivative market products such as stock futures, options and interest rate futures.

Securities are essentially civil rights with property attributes. The characteristic of securities is that civil rights are embodied in securities, so that rights are combined with securities, and rights are embodied in securities, that is, rights securitization. It is a legal phenomenon in the form of securities in the way and process of rights holders exercising their rights, a social phenomenon of symbolization of investors' investment property, and a sign and result of developed social credit.

Securities must be associated with specific forms of expression. In the process of securities development, the earliest basic way to commend securities rights is paper, and the specific rights are expressed in words or graphics on special paper.

Therefore, securities are also called "documentary evidence" and "documentary evidence". However, with the rapid development of economy, especially the development of electronic technology and information network, paperless securities have appeared in modern society. Securities investors almost no longer own any securities in the form of physical coupons, and the number of securities they hold or the securities rights are recorded in the investor's account accordingly. The development process from "paper securities" to "paperless securities" reveals the great differences between modern securities concepts and traditional securities concepts.

As a written document commending certain civil rights, securities have the following basic characteristics:

1. Securities are certificates of title.

Securities are documents of rights with property value. In modern society, people are not satisfied with the direct possession, use, income and disposal of wealth, but pay more attention to the ultimate domination and control of wealth, and securities, a new form of property, came into being. Holding securities means that the holder has control over the property represented by securities, but this control is not direct control but indirect control.

2. Securities are negotiable certificates of rights.

The vitality of securities lies in their liquidity. Traditional civil rights always face many obstacles when they are transferred. As far as civil property rights are concerned, it is unnecessary in nature because it does not involve personality and identity, but its transfer is a complex civil act.

3. Securities are the evidence of income right.

The ultimate goal of securities holders is to obtain income, which is the direct motivation of securities holders to invest in securities. On the one hand, securities itself is a kind of property right, which embodies a specific property right. Securities holders can obtain benefits by exercising this property right, such as dividend income (stocks) or interest income (bonds);

On the other hand, the holders of securities can gain income by transferring securities, such as buying at a low price and selling at a high price in the secondary market, and they can gain income through the price difference, especially speculative income.

4. Securities are risky certificates of rights.

The risk of securities is that investors may not get expected returns or even losses because of changes in the securities market or issuers. The risk and return of securities investment are related. In the actual market, any securities investment activities are risky, and there is no investment that completely avoids risks.