What is Lot Size?
Lot size is exchange-defined quantity per derivative contract — changes periodically.
Formula
Lot Size Calculation: Nifty Futures: - Index Value: 22,000 - Lot Size: 50 - Contract Value: 22,000 × 50 = ₹11,00,000 Bank Nifty Futures: - Index Value: 47,000 - Lot Size: 15 - Contract Value: 47,000 × 15 = ₹7,05,000 Stock Futures (Reliance): - Stock Price: ₹2,500 - Lot Size: 250 - Contract Value: 2,500 × 250 = ₹6,25,000 Margin (assume 10%): Nifty: ₹1,10,000 Bank Nifty: ₹70,500 Reliance: ₹62,500
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 Lot Size shows up on Indian index, equity, and futures books — update to live quotes in your journal.
Nifty 50 perspective
Nifty lot size 25 at 24,300 → contract notional ≈ ₹6.08L before margin; position sizing must use lots, not arbitrary share counts.
Bank Nifty futures perspective
Bank Nifty lot 30 at 55,000 → notional ₹16.5L per lot; MIS margin is a fraction but gap risk is full notional exposure overnight.
How to validate
- Validate Lot Size 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 Lot Size.
- 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 Lot Size 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 Lot Size 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
Log lot count and lot size at entry; recalc risk when exchange revises.
Related terms
A futures contract obligates parties to transact the underlying at settlement per NSE rules, with daily mark-to-market and margin.
Index futures are standardized NSE F&O contracts on benchmark indices (notably Nifty 50 and Nifty Bank) that cash-settle against official closing prices. They offer leveraged exposure to broad market direction with transparent lot sizes and deep liquidity relative to most stock futures.
Margin is the deposit brokers require to hold leveraged positions. It can rise sharply into expiry or on gap moves against you.
Nifty 50 tracks 50 large NSE stocks — widely used benchmark and futures underlying.
Position sizing translates account risk into quantity. With a ₹2,000 risk cap and ₹40 stop per share, size is 50 shares — before lot multiples on F&O.
SPAN (Standard Portfolio Analysis of Risk) margin is the minimum margin NSE clearing requires to hold a derivatives portfolio, computed from scenario-based risk across price and volatility moves. It replaces fixed-percentage margin with a portfolio-aware number that can shrink when you hedge and expand when exposure concentrates.
FAQ
Fractional lots?
Not on exchange F&O — scale via contract count only.
Stock vs index lot size?
Index lots are large rupee delta — size carefully.
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