1. What is the CSI 500 Index?

1. CSI 500 Index, referred to as CSI 500 (CSI 500), is one of the indices developed by China Securities Index Co., Ltd., excluding all A-shares from the CSI 300 Index constituent stocks and the top 300 total market capitalization

After the stocks, it is composed of the top 500 stocks in terms of total market capitalization, which comprehensively reflects the stock price performance of a group of small and medium-sized companies in the Chinese A-share market.

2. The CSI 500 Index generally represents the small and mid-cap index of the Chinese securities market, including mid-cap and small-cap.

3. The Shanghai quotation code of the CSI 500 Index is 000905, and the Shenzhen quotation code is 399905. 4. The samples of the CSI 500 Index are adjusted every six months, and the sample adjustment is implemented on the afternoon of the second Friday of June and December each year.

One trading day.

The sample proportion for each adjustment generally does not exceed 10%.

2. Calculation method of CSI 500 Index 1. The CSI 500 Index uses adjusted share capital as the weight and is calculated using the Pasch weighted comprehensive price index formula.

Among them, the adjusted share capital is obtained according to the hierarchical and stalling method.

2. Calculation formula: reporting index = total adjustment of market capitalization of constituent stocks during the reporting period/base period × 1000. Among them: total adjusted market capitalization = Σ (market price × adjusted share capital of sample stocks) 3. Correction of CSI 500 Index 1. CSI 500 Index

Use the "divisor correction method" correction.

When the list of sample stocks or capital structure changes or the adjusted market value of sample stocks changes due to non-trading factors, the "divisor correction method" is used to correct the original fixed divisor to ensure the continuity of the index.

2. The correction formula is: adjusted market value before correction/original divisor = adjusted market value after correction/new divisor. Among them, the adjusted market value after correction = adjusted market value before correction + new (subtracted) adjusted market value; it is derived from this formula

The new divisor (i.e. the revised divisor, also known as the new base period) is used to calculate the index.

3. Situations that require correction: (1) Ex-dividend: Whenever there is an ex-dividend (dividend payment) for a sample stock, the index will not be revised and will be allowed to fall back naturally; (2) Ex-right: Whenever there is a bonus issue or rights issue for a sample stock, the index will be

The index is revised before the ex-dividend base date.

Adjusted market value after correction = ex-rights quotation × number of shares after ex-rights + adjusted market value before correction (excluding ex-rights stocks); (3) Trading suspension: When a sample stock is suspended from trading, its last transaction price will be used to calculate the index until trading resumes; (4)

) Delisting: If a sample stock is delisted (trading terminated), the index will be revised before its delisting date; (5) Equity changes: Any sample stock changes in equity capital (such as changes in equity capital caused by the issuance of new shares, rights issue listing, internal employee stock listing)

etc.), the index will be revised before the change date of the share capital of the sample stocks; when the list of constituent stocks changes, the index will be revised before the change date; (6) Trading suspension: When some sample stocks are suspended from the market, the index will be calculated as usual; when all the sample stocks are suspended from the market, the index will be calculated as usual;

The index stops calculating.