Encyclopedia5 min read
Margin in Options Trading: SPAN & Exposure
How margin works for buying vs selling Nifty options — why sellers need more capital than buyers.
Buying vs Selling Margin
Buyers pay premium — margin equals premium for long options. Sellers post SPAN + exposure margin based on underlying move risk — can jump intraday on volatility expansion.
Never max margin usage — leave buffer for MTM spikes. Brokers may square off if shortfall.
Margin Discipline
Defined-risk spreads reduce margin vs naked positions.
Frequently Asked Questions
- Who is this guide for?
- Nifty and Bank Nifty option traders who want structured education around chain reading, OI, and risk — not signal tips.
- Can I trade from this article alone?
- Use it as education paired with live analysis on OptionTools. Paper trade or size down while validating ideas.
Key Takeaways
- Selling requires substantially more margin than buying.
- Keep unused margin buffer for spikes.
- Spreads lower margin vs naked shorts.
Related Articles
- Option Selling Explained: Income, Margin, and Tail RiskHow selling (writing) options works — theta collection, margin requirements, and why naked selling destroys accounts without discipline.
- Iron Condor Strategy for Range-Bound Index WeeksSell OTM call and put spreads to collect premium when Nifty trades inside a expected range — setup, margin, and adjustment basics.
- Position Sizing for Nifty & Bank Nifty OptionsSize lots from account risk percent, stop distance in premium, and correlation — not gut feel.