Options risk management
Options attract many retail traders because the premium looks small. Studies by SEBI have reported that a large majority of individual traders in equity derivatives lose money, and most of them keep trading. Read the SEBI investor material and treat the following as survival rules, not a way to riches.
Know what you can lose
| Position | Maximum loss | Typical trap |
|---|---|---|
| Long call or put | Premium paid | Time decay and falling volatility can lose money even when direction is right |
| Short (naked) call | Theoretically unlimited | Gap against you, margin call, forced exit |
| Short (naked) put | Strike price minus premium (large) | Crash, margin spike |
| Spreads (defined risk) | Limited by the structure | Poor liquidity on the far leg, wide spreads |
Size by premium at risk
For buyers, treat the full premium as the loss. If you risk 1% of capital per trade, the premium for the trade should not exceed 1%, whatever the lot size looks like. For sellers, size by the worst plausible move, not the margin required. Margin is what the exchange charges; it is not the risk.
The main risks
- Theta (time decay): options lose value every day; decay speeds up near expiry.
- Vega (volatility): implied volatility often falls after events such as results or policy announcements, which can cut option prices even when the underlying moves your way.
- Delta and gamma: near expiry, small moves in the underlying can change an option's value and your exposure very quickly.
- Liquidity: far out-of-the-money strikes and stock options can have wide bid-ask spreads.
- Expiry-day risk: large, rapid price swings, higher slippage, and for stock options, physical settlement obligations. Understand your exchange's settlement rules before holding to expiry.
Prefer defined risk
If you sell options, use structures with a bought wing (for example spreads or iron condors) so that the loss is capped. Margin benefit for hedged positions is also lower than for naked positions, which keeps leverage in check.
Rules that protect capital
- Set a daily and weekly loss limit and stop when it is reached.
- Do not average down on an option that is decaying.
- Avoid holding option positions through binary events unless the size is small enough to lose entirely.
- Track total margin used. Many traders keep it well below half of their capital so that a margin spike does not force an exit.
- Remember costs: brokerage, STT on exercised or sold options, exchange charges and GST. Check current rates; SEBI and the exchanges revise lot sizes, margins and expiry rules from time to time.
Before you begin
Paper trade for several months, keep a journal of every trade, and begin with the smallest size. Use the exchange educational resources listed on our official links page.