That's not true. Securities code refers to the code owned by each listed securities. There is a one-to-one correspondence between securities and codes. Once the codes of securities are determined, they will not change. In the past, the stock code of Shenzhen Stock Exchange was 4 digits, but now it is 6 digits like Shanghai Stock Exchange (2007). Stock codes use numbers to represent different meanings of stocks. Besides distinguishing various stocks, stock code has its potential significance. For example, 600*** is the stock code listed on the Shanghai Stock Exchange, and 6006** is the earliest listed stock. The stock code of a company is similar to the license plate number, which can show the strength and popularity of the company, such as Yantian Port 00088 and Emei Mountain 000888. In a narrow sense, securities mainly refer to securities products in the securities market, including property rights market products, debt market products and derivatives market products. The discipline system of securities research is an organic system composed of various branches that study the behavior characteristics and operating rules of securities market from different angles. It mainly includes two research fields: traditional securities research theory and evolutionary securities research theory.

The difference between securities and stocks:

1, one is a species and the other is a specific variety. In short, securities include commodity securities, currency securities and capital security. A stock is a kind of security, and a stock is a valuable security.

2. Stock is a kind of securities. Securities include commodity securities, currency securities and capital security. Commodity securities include: bills of lading, waybills, warehouse receipts, etc.

3. Monetary securities mainly include two types: one is commercial securities, mainly including commercial bills of exchange and commercial promissory notes. The other is bank securities. It mainly includes bank drafts, cashier's checks and checks.

4. Securities in a narrow sense refers to capital security. In daily life, people usually call it capital security securities directly. Securities refer to securities produced by financial investment or activities directly related to financial investment. Holders have the right to require the issuer to provide income, including stocks, bonds and their derivatives. Such as fund securities and convertible securities.

5. Stock is just a kind of securities. Generally speaking, the most important types of securities that individual investors are exposed to are stocks, funds and bonds. Stocks and bonds are both valuable securities and are the two major financial instruments in the securities market. Both are issued in the primary market and transferred in the secondary market.