What is Sensex?
S&P BSE Sensex is 30-stock index — India’s widely cited benchmark with long history.
Formula
Sensex Calculation: Index = (Free-Float Market Cap / Base Market Cap) × 100 Free-Float Methodology: - Counts only publicly tradable shares - Excludes promoter holdings - Larger companies have more weight Historical Milestones: 1979: Base of 100 1992: Crossed 4,000 2006: Crossed 10,000 2014: Crossed 25,000 2021: Crossed 50,000 2024: ~75,000
Indian market context (NSE)
Reference levels: Nifty 50 at 24,300, Reliance Industries at ₹1,300, Bank Nifty futures at 55,000 (lot size 30). Examples below show how Sensex shows up on Indian index, equity, and futures books — update to live quotes in your journal.
Nifty 50 perspective
Sensex in Indian context at Nifty 24,300: apply SEBI/regulatory framing where relevant and tag index trades separately in weekly review.
Reliance Industries perspective
Sensex using Reliance at ₹1,300 as a liquid large-cap example — adjust numbers to your live quote and contract note.
Bank Nifty futures perspective
Sensex with Bank Nifty futures at 55,000 — respect lot size 30 and quarterly vs monthly contract rules on NSE.
How to validate
- Validate Sensex readings by session tag — open hour stats differ from midday.
- Check behaviour on gap-up/gap-down days separately on Nifty tags.
- Correlate with India VIX buckets (calm vs elevated) before changing rules.
- Confirm liquidity notes were filled on fast-market days.
How to track in TradeLyser
- Tag session phase and liquidity state on each trade influenced by Sensex.
- Daily journal: one line on market structure context (gap, range, trend).
- Filter analytics by session tag during monthly review.
- Note India VIX at session open when structure rules depend on volatility.
Best practices
- Pre-define how Sensex maps to session tags each quarter.
- Reduce size on expiry and event sessions when structure breaks.
- Journal gap days explicitly — averages hide gap risk.
- Align structure tags with India cash session hours (9:15–15:30).
Common pitfalls
- Applying midday rules to the opening 15 minutes without adjustment.
- Trading illiquid names with the same Sensex assumptions as Nifty.
- Forgetting overnight gap risk on “intraday” tags.
- Over-tagging — so many structure labels that review becomes noise.
How to use this in TradeLyser
Daily journal optional Sensex % alongside Nifty for macro context.
Related terms
Beta estimates how much your trading book moves relative to a benchmark. Beta near 1 suggests similar swing to the index; below 1 less sensitive; above 1 more sensitive.
Bombay Stock Exchange lists equities and derivatives — some symbols trade both BSE and NSE.
Breadth indicators compare advancing vs declining issues or new highs/lows.
Nifty 50 tracks 50 large NSE stocks — widely used benchmark and futures underlying.
FAQ
Trade Sensex futures?
BSE index products exist — tag instrument explicitly.
Sensex vs Nifty beta?
Usually high correlation — note divergences.
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