The only index the CSE has been maintaining since 10th October 1995 is a ALL SHARE PRICE INDEX using Chained Paasche method. It faces question of clarity. This index was subject to unusual ups and downs and without a distinct base value. Therefore in need of a clean slate CSE finds the date 1 January 2000 is the best date to start new Indices:
An All Share Price Index with new formula and base date 30th December 1999 (the last day of the year) and new base index of thousand (to mark the millenium) will replace the existing one and A completely new Selective Index incorporating 30 scrips with base date 30th December 1999 and base index 1000.
We have studied index of a number of bourses and found that the Laspayers Method to calculate index is regarded as the most transparent and scientific method. The method is described below in this write-up.
The following conditions will be followed while calculating the All Share Price Index:
At the beginning of new millennium a selective Index will be introduced, which is found to be very popular in almost all the developed exchanges worldwide. Here the selection criteria play a very important role in forming an index.
It provides a discussion about the important criterion for an index, which is to be used as a benchmark of performance. The criterion is that the movement of the index fully represents the aggregate movement of the index's constituent assets and that the index's returns are realizable by an investor who has held a portfolio identical to the asset mix of the index. Value-Weighted Index satisfies the above criterion.
Selection of stocks for the benchmark index should be such that it represents the whole market. In addition it will be guaranteed that the constituent stocks have high percentage coverage of the market in terms of market value. This will make it difficult if not possible for a few investors to manipulate the movement of the index.
(After revision in the Listing & Index Committee Meeting held on 28th Apr 2009)
Two layer methods are followed for selection of listed companies in the CSE-30 Index. In the first layer method, basic criteria are considered for primary selection.
On being qualified on the basis of the Basic Criteria, the companies are required to meet the following further Selection Criteria to have the final berth in CSE-30 Index.
Chittagong Stock Exchange (CSE) launched a new index named CSCX (CSE Selective Categories' Index) comprised A, B & G category companies from 14th February 2004 to replace the earlier CSE Trade Volume Weighted Index.
The Base Date of this index is 15th April 2001 (when A, B & Z category were introduced) and Base Value is set to 1000.
The new index includes all but not the Z category companies. This also excludes the companies/scrips which are debt securities, mutual funds, suspended for indifinte period and non-traded for preceding six months of review meeting. The index will be reviewed in the Index Committee Meeting after every six months like other two indices of CSE.
This index will be disseminated on line to all the Brokers' Work Stations (BWSs) during trading sessions and after every three minutes the index value will be refreshed.
According to the said bases of this index the value of the index on 11th February 2004 stands at 1165.3754. A graphical view from its inception i.e. 15th April 2001 is as below:
The construction principle of this index based on Laspeyres method like other two CSE indices, CSE All Share Price Index and CSE-30 Index. It may be mentioned here that the base value of these two indices was also set to 1000 with a base date 30th December 1999. The current values (as on 11th Feruary 2004) of CSE All Share Price Index and CSE-30 Index are 1601.54 and 1483.60 respectively.