BSE-100 Index

 

 

Introduction

A broad-based index, the BSE-100 was formerly known as the BSE National index.  This Index has 1983-84 as the base year and was launched in 1989.  In line with the shift of the BSE Indices to the globally accepted Free-Float methodology, BSE-100 was shifted to Free-Float methodology effective from April 5, 2004.  The method of computation of Free-Float index and determination of free-float factors is similar to the methodology for SENSEX.

Index Specification

Base Year	1983-84
Base Index Value	100
Date of Launch	January 03, 1989
Method of calculation	Launched on full market capitalization method and effective April 05, 2004, calculation method shifted to free-float market capitalization.
Number of scrips	100
Index Constituents	Click here for list of constituents
Index calculation frequency	Real Time
Index calculation and Maintenance	Click here for Index Calculation and Maintenance
Index Reach	Click here for scrip-wise, sector wise market capitalization, weightage etc.
Market Capitalization and Turnover Coverage	Click here for market capitalization and turnover coverage
Historical Values of Index	Index, Price Earnings, Price to Book Value ratio and Dividend Yield %
Historical Replacements	Click here for history of replacements
Historical Notices	Click to search Historical Notices on Index Replacements

Base Year

The financial year 1983-84 has been chosen as the base year. The price stability during that year and proximity to the index series were the main consideration for choice of 1983-84 as the base year.  The base value was fixed at 100 points.

Dollex-100

BSE also calculates a dollar-linked version of SENSEX and historical values of this index are available since its inception. (For more details click 'Dollex series of BSE indices')

BSE-100 index - Scrip Selection Criteria

The general guidelines for selection of constituents in BSE-100 are as follows:

1. Trading Frequency: The scrip should have been traded on 95% of the trading days in the last three months. Exceptions can be made for extreme reasons like scrip suspension etc.
2. Final Rank: The scrip should figure in the top 200 companies listed by final rank. The final rank is arrived at by assigning 75% weightage to the rank on the basis of three-month average full market capitalization and 25% weightage to the liquidity rank based on three-month average daily turnover & three-month average impact cost.
3. Industry/Sector Representation: Scrip selection would generally take into account a balanced sectoral representation of the listed companies in the universe of BSE.
4. Track Record: In the opinion of the BSE Index Committee, the company should have an acceptable track record.