The GEM index is based on the starting date, and calculates the stock price of the day one by one according to the circulating market value of all the stocks on the GEM, and then compares it with the "benchmark" on the opening day.
In order to reflect the situation of the Growth Enterprise Market more comprehensively, provide investors with more tradable index products and the subject matter of financial derivatives, promote index fund products and enrich the product varieties in the securities market, Shenzhen Stock Exchange officially compiled and published the Growth Enterprise Market Index on June 20 10/day.
The compilation of this index refers to the compilation methods of Shenzhen Component Index and Shenzhen 100 Index and international practices (including total income index and pure price index). At this point, the GEM index, Shenzhen Stock Exchange Index and Small and Medium Board Index * * * together constitute the core index reflecting the operation of listed stocks in Shenzhen Stock Exchange.
First of all, the sample selection of the index is mainly based on two indicators: "market share of circulation market value" and "market share of transaction amount", which embodies the characteristics of high circulation market share and active trading in Shenzhen.
Secondly, the index calculation takes the "accurate value" of the sample share "freely circulating share capital" as the weight, which eliminates the leverage effect brought by the ownership structure and makes the index performance more sensitive, accurate and true.
Finally, the index sample stocks are adjusted once every quarter to reflect the rapid growth of the Growth Enterprise Market.