According to their different properties, securities can be divided into two categories: marketable securities and voucher securities.

Voucher securities are priceless securities, including demand deposit slips, IOUs and receipts.

Securities can be divided into the following three types:

(1) Capital security, such as stocks and bonds;

(2) Monetary securities, including bank notes and bank drafts;

(3) Property securities, such as waybills, bills of lading, warehouse receipts, etc.

Securities is a kind of ownership or debt certificate with a certain face value, which proves that the holder has the right to obtain certain income on schedule and can be freely transferred and traded. Usually referred to as securities for short. The main forms are stocks and bonds. Among them, bonds can be divided into corporate bonds, public bonds and real estate mortgage bonds. Securities itself has no value, just because it can bring a certain dividend or interest income to the holders, so it can be bought, sold and circulated freely in the securities market.

The securities industry is a specialized industry engaged in securities issuance and trading services. Its main business activity is to communicate the direct contact between the demanders and suppliers of securities, and provide services for the securities transactions of both parties, so as to promote the efficient issuance and circulation of securities and maintain the operation order of the securities market. It is mainly composed of financial institutions such as stock exchanges, securities companies and securities associations.