The GEM index is based on the circulating market value of all GEM stocks, and then the stock prices of the day are calculated one by one, and then compared with the benchmark on the opening day.

In order to reflect the Growth Enterprise Market more comprehensively, Shenzhen Stock Exchange has officially compiled and published the Growth Enterprise Market Index since June 1 20, providing investors with more tradable index products and financial derivatives, promoting index fund products and enriching securities market products. The compilation of this index refers to the compilation methods and international practices (including total income index and pure price index) of Shenzhen Component Index and Shenzhen 100. So far, the GEM index and the main board index of Shenzhen Stock Exchange * * * have become the core indexes reflecting the operation of listed stocks in Shenzhen Stock Exchange.

Growth enterprise market, also known as the second board market, namely the second stock exchange market, is a kind of securities market different from the main board market, providing financing channels and growth space for entrepreneurial enterprises, small and medium-sized enterprises and high-tech industrial enterprises that need financing and development. Growth enterprise market is an important supplement to the main board market and occupies an important position in the capital market. The stock code of listed companies in China Growth Enterprise Market starts from 300.

Compared with the main board market, the listing requirements of GEM are often more relaxed, mainly reflected in the establishment time, capital scale, medium and long-term performance and so on. Growth enterprise market is characterized by low threshold and strict operating requirements, which helps potential small and medium-sized enterprises to obtain financing opportunities.

Most companies listed on GEM are engaged in high-tech business, with high growth rate, but they are often established in a short time, with small scale and outstanding performance, but there is great room for growth. Therefore, GEM is a stock market with low threshold, high risk and strict supervision, and it is also the cradle of incubating technology growth enterprises.