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Method of Computation NIFTY 50 is computed using free float market capitalization weighted method, wherein the level of the index reflects the total market value of all the stocks in the index relative to a particular base period. The method also takes into account constituent changes in the index and importantly corporate actions such as stock splits, rights, etc without affecting the index value. Base Date and Value The base period selected for NIFTY 50 index is the close of prices on November 3, 1995, which marks the completion of one year of operations of NSE's Capital Market Segment. The base value of the index has been set at 1000 and a base capital of Rs.2.06 trillion. Criteria for Selection of Constituent Stocks Liquidity (Impact Cost) For inclusion in the index, the security should have traded at an average impact cost of 0.50% or less during the last six months for 90% of the observations for a basket size of Rs. 2 Crores. Impact cost is cost of executing a transaction in a security in proportion to the weightage of its free float market capitalisation as against the index free float market capitalisation at any point of time. This is the percentage mark- up suffered while buying / selling the desired quantity of a security compared to its ideal price (best buy + best sell) / 2 Others a) A company which comes out with an IPO will be eligible for inclusion in the index, if it fulfils the normal eligibility criteria for the index like impact cost, market capitalisation and floating stock, for a 3 month period instead of a 6 month period. b) The constituents should be available for trading in the derivatives segment (Stock Futures & Options market) on NSE. c) Replacement of Stock from the Index: A stock may be replaced from an index for the following reasons: Compulsory changes like corporate actions, delisting etc. In such a scenario, the stock having largest free float market capitalization and satisfying other requirements related to liquidity, turnover and free float will be considered for inclusion. When a better candidate is available in the replacement pool, which can replace the index stock i.e. the stock with the highest free float market capitalization in the replacement pool has at least twice the free float market capitalization of the index stock with the lowest free float market capitalization. With respect to (2) above, a maximum of 10% of the index size (number of stocks in the index) may be changed in a calendar year. Changes carried out for (2) above are irrespective of changes, if any, carried out for (1) above. From June 26, 2009, NIFTY 50 is computed using Free Float Market Capitalisation weighted method, wherein the level of index reflects the free float market capitalisation of all stocks in Index
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Method of Computation
NIFTY 50 is computed using free float market capitalization weighted method, wherein the level of the index reflects the total market value of all the stocks in the index relative to a particular base period. The method also takes into account constituent changes in the index and importantly corporate actions such as stock splits, rights, etc without affecting the index value.
Base Date and Value
The base period selected for NIFTY 50 index is the close of prices on November 3, 1995, which marks the completion of one year of operations of NSE's Capital Market Segment. The base value of the index has been set at 1000 and a base capital of Rs.2.06 trillion.
Criteria for Selection of Constituent Stocks
Liquidity (Impact Cost)
For inclusion in the index, the security should have traded at an average impact cost of 0.50% or less during the last six months for 90% of the observations for a basket size of Rs. 2 Crores.
Impact cost is cost of executing a transaction in a security in proportion to the weightage of its free float market capitalisation as against the index free float market capitalisation at any point of time. This is the percentage mark- up suffered while buying / selling the desired quantity of a security compared to its ideal price (best buy + best sell) / 2
Others
a) A company which comes out with an IPO will be eligible for inclusion in the index, if it fulfils the normal eligibility criteria for the index like impact cost, market capitalisation and floating stock, for a 3 month period instead of a 6 month period.
b) The constituents should be available for trading in the derivatives segment (Stock Futures & Options market) on NSE.
c) Replacement of Stock from the Index:
A stock may be replaced from an index for the following reasons:
Compulsory changes like corporate actions, delisting etc. In such a scenario, the stock having largest free float market capitalization and satisfying other requirements related to liquidity, turnover and free float will be considered for inclusion.
When a better candidate is available in the replacement pool, which can replace the index stock i.e. the stock with the highest free float market capitalization in the replacement pool has at least twice the free float market capitalization of the index stock with the lowest free float market capitalization.
With respect to (2) above, a maximum of 10% of the index size (number of stocks in the index) may be changed in a calendar year. Changes carried out for (2) above are irrespective of changes, if any, carried out for (1) above.
From June 26, 2009, NIFTY 50 is computed using Free Float Market Capitalisation weighted method, wherein the level of index reflects the free float market capitalisation of all stocks in Index
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