The BSE Sensex or Bombay Stock Exchange Sensitive Index is a value-weighted index composed of over 4000 stocks with the base April 1979 = 100. It consists of the 300 largest and most actively traded stocks, representative of various sectors, on the Bombay Stock Exchange. These companies account for around one-fifth of the market capitalization of the BSE.
The base value of the Sensex is 100 on April 1, 1979 and the base year of BSE-SENSEX is 1978-79.
At irregular intervals, the Bombay Stock Exchange (BSE) authorities review and modify its composition to make sure it reflects current market conditions.
The abbreviated form "Sensex" was coined by Deepak Mohoni around 1990 while writing market analysis columns for some of the business newspapers and magazines. It gained popularity over the next year or two.
The stock market has grown by over ten times from June 1990 to today. Using information from April 1979 onwards, the long-run rate of return on the BSE Sensex can be estimated to be 0.52% per week (continuously compounded) with a standard deviation of 3.67%. This translates to 27% per annum, which translates to roughly 18% per annum after compensating for inflation.
Here is a timeline on the rise and rise of the Sensex through Indian stock market history.
On July 25, 1990, the Sensex touched the magical four-digit figure for the first time and closed at 1,001 in the wake of a good monsoon and excellent corporate results.
On January 15, 1992, the Sensex crossed the 2,000-mark and closed at 2,020 followed by the liberal economic policy initiatives undertaken by the then finance minister and current Prime Minister Dr Manmohan Singh.
On February 29, 1992, the Sensex surged past the 3000 mark in the wake of the market-friendly Budget announced by the then Finance Minister, Dr Manmohan Singh.
On March 30, 1992, the Sensex crossed the 4,000-mark and closed at 4,091 on the expectations of a liberal export-import policy. It was then that the Harshad Mehta scam hit the markets and Sensex witnessed unabated selling.
On October 8, 1999, the Sensex crossed the 5,000-mark as the BJP-led coalition won the majority in the 13th Lok Sabha election.
On February 11, 2000, the infotech boom helped the Sensex to cross the 6,000-mark and hit and all time high of 6,006.
On June 20, 2005, the news of the settlement between the Ambani brothers boosted investor sentiments and the scrips of RIL, Reliance Energy, Reliance Capital and IPCL made huge gains. This helped the Sensex crossed 7,000 points for the first time.
On September 8, 2005, the Bombay Stock Exchange's benchmark 30-share index -- the Sensex -- crossed the 8000 level following brisk buying by foreign and domestic funds in early trading.
The Sensex on November 28, 2005 crossed the magical figure of 9000 to touch 9000.32 points during mid-session at the Bombay Stock Exchange on the back of frantic buying spree by foreign institutional investors and well supported by local operators as well as retail investors.
The Sensex on February 6, 2006 touched 10,003 points during mid-session. The Sensex finally closed above the 10K-mark on February 7, 2006.
The Sensex on March 21, 2006 crossed the magical figure of 11,000 and touched a life-time peak of 11,001 points during mid-session at the Bombay Stock Exchange for the first time. However, it was on March 27, 2006 that the Sensex first closed at over 11,000 points.
The Sensex on April 20, 2006 crossed the magical figure of 12,000 and touched a life-time peak of 12,004 points during mid-session at the Bombay Stock Exchange for the first time.
Later,on May 22,2006,the Sensex swung a wild 1100 points during intraday,leading to suspension of trading for the first time since May 17,2004.It soon recovered enough and closed 400 points down at the 10400 levels.This is the largest ever intraday crash in the history of the Sensex.
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