What is Sensex (BSE 30)?
Sensex is the benchmark index of the Bombay Stock Exchange, tracking 30 of the largest and most actively traded Indian companies — India's oldest stock market index.
Formula
Free-float market capitalization weighted index (base year: 1978-79 = 100)
How to Interpret
Sensex and Nifty 50 move closely together. Sensex is more concentrated (30 stocks vs. 50) and historically was the primary Indian benchmark.
Typical Ranges
Similar long-term CAGR to Nifty 50 (~12-14%). Used as legacy benchmark.