

As an underlying index of the index futures and options of the KRX, KOSPI 50 is based on the stocks ranked the top 50 of the constituents of KOSPI 200, in terms of the market capitalization. The base date of KOSPI 50 is January 3, 2000, with a base index of 1000.
KOSPI 50 is highly recognized and deemed to have exceptional market ability given that its constituents represent the blue-chips listed on the KRX-Stock Market.
Selection of Constituent and Replacement Stocks
- KOSPI 50 constituents are the top 50 constituents in terms of market capitalization and regardless of industry, calculated regularly at deliberation date for KOSPI 200 constituent stocks. The stocks, whose market capitalization is ranked next 20 places, i.e., from top 51 to top 70, are placed on the replacement list.
Regualr and Special Realignment of the Constituents
- In common with the KOSPI 200, regualr realignment for KOSPI 50 takes place regularly once a year on the trading day after the last trading day for June contracts in the futures and options markets. In special occasions such as delisting or designation as administrative stock, constituents are substituted by replacement stocks. Furthermore, in order to ensure the stability of the index, strict standards are imposed on the admission and removal of constituents so that the number of stocks replaced is as small as possible. Accordingly, to be newly selected as a constituent, the market capitalization of a stock must be ranked within 80% of that of the constituents, and will be removed from existing constituent when ranking of market capitalization of such stock must fall below 120% of the constituents. Other index calculations and maintenance methods of KOSPI 100 are the same as that of KOSPI 200.
Publication
- KOSPI 50 is updated on the KRX website every 10 seconds and is available in statistical KRX publication “KRX Review” on a daily, monthly, and yearly basis. In addition, past indices have been made available for investors retrospective to January 3, 1998.