The stock price indexes of the Shenzhen Stock Exchange are: (1) Composite index: Shenzhen Composite Index, Shenzhen A-share Index, Shenzhen B-share Index (2) Component index: including Shenzhen Component Index, Component A-share Index, Component B

Stock index, industrial index, business index, financial index, real estate index, public utility index, comprehensive enterprise index.

(3) Shenzhen Stock Exchange Fund Index 2. Base date and base day index (1) The Shenzhen Stock Exchange Composite Index uses April 3, 1991 as the base day and began to be released on April 4, 1991.

The base index is 100.

(2) The Shenzhen Stock Exchange A-share Index takes April 3, 1991 as the base date and was released on October 4, 1992.

The base day index is set at 100.

(3) The Shenzhen Stock Exchange B-share Index takes February 28, 1992 as the base date and was released on October 6, 1992.

The base day index is set at 100.

(4) The component index category uses July 20, 1994 as the base date and will be released on January 23, 1995.

The base day index is set at 1,000.

(5) The Shenzhen Stock Exchange Fund Index takes June 30, 2000 as the base day and will be released on July 3, 2000.

The base day index is set at 1000. 3. Calculation range (1) The stocks included in the index calculation range are called index stocks.

(2) The index stocks of the comprehensive index category are all stocks listed on the Shenzhen Stock Exchange.

All stocks are used to calculate the Shenzhen Stock Exchange Composite Index, of which A shares are used to calculate the Shenzhen Stock Exchange A-share index; B shares are used to calculate the Shenzhen Stock Exchange B-share index.

(3) The index stocks of the component stock index (i.e., the component stocks) are forty stocks selected from listed companies.

All A shares and B shares among the constituent stocks are used to calculate the Shenzhen Stock Exchange Component Index, of which the A shares are used to calculate the component A share index, and the B shares are used to calculate the component B share index.

Component stocks are classified according to their industries, and their A shares are used to calculate the industry classification index.

4. Calculation method (1) Both the comprehensive index and the component stock index are Piasco weighted price indexes, that is, the number of shares of the index stocks on the calculation day is used as the weight for weighted calculation.

(2) The weights of the two types of indexes are: Comprehensive index type: number of shares = total number of shares of all listed companies Component index type: number of shares = number of tradable shares of constituent stocks (3) The index calculation formula is the intraday index

= (Total market value of index stocks on the current day/Total market value of index stocks on the base day)

Ingredient index.

The Shenzhen Stock Exchange B-share index and component B-share index are still calculated in Hong Kong dollars.

(5) After the call auction ends on each trading day, the opening price of the stock generated by the call auction is used (if there is no transaction, the closing price of yesterday is taken) to calculate the opening index, and then the real-time index is calculated in a chain manner until the market closes.

Daily chain calculation formula: Today's real-time index = previous day's closing index

market capitalization.

Total market value of index A shares = ∑ (index A share price × number of index A shares).

The total market value of index B shares = ∑ (index B share price × number of index B shares) × average exchange rate of last week’s foreign exchange adjustment.

(6) The calculation method of the fund index is the same as that of the component stock index, with the number of new fund units directly listed on the Shenzhen Stock Exchange (that is, the number of tradable fund units) as the weight.

Attachment: In order to ensure the objectivity and fairness of the constituent stock samples, the Shenzhen Stock Exchange does not have lifelong tenure for the constituent stocks. The Shenzhen Stock Exchange regularly inspects the representativeness of the constituent stocks, promptly replaces companies with reduced representativeness, and selects more representative companies.

company of.

Of course, changes will not be too frequent, and the inspection time is January, May, and September every year.

In accordance with the basic principles of adjusting constituent stocks and referring to international practices, the Shenzhen Stock Exchange has formulated scientific standards and a step-by-step method for selecting constituent stock samples, that is, it first determines the shortlisted companies from all listed companies based on the preliminary selection criteria, and then determines the shortlisted companies.

Selected constituent stock samples.

1.

Identify shortlisted companies.

The criteria for determining shortlisted companies include three requirements: listing time, market size, and liquidity: (1) Have a certain listing and trading date, which should generally be more than 3 months.

(2) There is a certain scale of listing.

Arrange and accumulate the circulating market capitalization of listed companies as a proportion of the market (3-month average) from largest to smallest, and the shortlisted companies will be among 90%.

(3) There is a certain degree of market liquidity.

Arrange and accumulate the transaction amount of listed companies in the market share (3-month average) from largest to smallest, and the shortlisted companies will be among 90%.

2.

Determine the constituent stock samples.