The BSE, formerly the Bombay Stock Exchange, is Asia's oldest stock exchange. Founded in 1875 and located on Dalal Street in Mumbai, it is one of India's two main stock exchanges, along with the NSE, and is home to the Sensex, India's best-known stock market index.
What the BSE is
The BSE began as an association of share brokers who met under a banyan tree in Mumbai in the 19th century. Over the decades it grew into a formal exchange, and in the 1990s it moved from a trading floor to an electronic, screen-based system. Today it is a modern, fully electronic exchange where shares, ETFs, bonds, derivatives and mutual fund units are traded. BSE is also a listed company itself.
A very large number of companies are listed on the BSE, including many small companies that are not listed on the NSE. It also runs a dedicated platform for small and medium enterprises (SMEs).
How it works in India
Like the NSE, the BSE matches buy and sell orders placed by investors through SEBI-registered brokers. Trades are settled through a clearing corporation, generally one working day after the trade (T+1). Trading hours are the same as the NSE: the normal session runs from 9:15 am to 3:30 pm on weekdays. The BSE is regulated by SEBI.
Many large companies are listed on both the BSE and the NSE. Because traders act quickly on any price difference, the share price of such a company is usually almost the same on both exchanges.
The Sensex
The S&P BSE Sensex tracks 30 large, well-established companies listed on the BSE. When news reports say "the market rose today", they often mean the Sensex rose. Its long history makes it a popular way to see how India's largest companies have performed over decades.
A simple example
A small company you are researching is listed only on the BSE. You can still buy its shares through your broker by selecting the BSE when placing the order. The shares are credited to your demat account after settlement, exactly as with an NSE trade.
Why it matters for investors
The BSE gives investors access to a very wide range of companies, including many smaller ones, a long-standing benchmark in the Sensex, and the same regulatory protections as other Indian exchanges.
The BSE SME platform and other segments
Besides its main board, the BSE runs a dedicated SME platform where smaller companies can list with lighter requirements. Shares on SME platforms often trade in larger minimum lots and less frequently, so they can be harder to buy and sell. The BSE also offers trading in derivatives, currency and debt, and runs BSE StAR MF, a widely used platform for buying and selling mutual fund units through intermediaries. For most investors, though, the BSE matters as a place to buy and hold company shares.
Common misconceptions
"The BSE is outdated." It is fully electronic and modern, despite its long history.
"Prices are very different on the BSE." For companies listed on both exchanges, prices are usually nearly identical.
"BSE-only companies are risky by default." Some are small and less frequently traded, which needs care, but listing location alone does not decide quality.
Frequently asked questions
What does BSE stand for?
It was the Bombay Stock Exchange; it is now officially called BSE Limited.
How many companies are in the Sensex?
30 large companies.
Are BSE trading hours different from the NSE?
No, the main equity session runs from 9:15 am to 3:30 pm on both.
Who regulates the BSE?
SEBI.
How to use this on PositoAI
PositoAI tracks both NSE and BSE companies, including companies listed only on the BSE, using official exchange closing prices. See the Sensex and Nifty 50 companies on Senty, and check Flows for bulk and block deals on both exchanges.
Summary
The BSE, founded in 1875, is Asia's oldest stock exchange and one of India's two main exchanges. It is fully electronic, lists a very large number of companies including many small ones, and is home to the 30-company Sensex. It follows the same trading hours, T+1 settlement and SEBI regulation as the NSE.