Updated 2025-06-04·Editorial policy·Trading system

What is Assignment Risk?

Assignment risk applies when you are short options: the buyer may exercise, forcing you to deliver or take shares (equity) or cash-settle (many index contracts).

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 Assignment Risk shows up on Indian index, equity, and futures books — update to live quotes in your journal.

Nifty 50 perspective

Nifty at 24,300: weekly/monthly option chains centre on round strikes (24,000 / 24,500). Assignment Risk on ATM Nifty options shifts quickly into expiry — India VIX and event risk (RBI, budget) reprice premiums independent of spot.

Bank Nifty futures perspective

Bank Nifty futures at 55,000: hedging with options or trading assignment risk on Bank Nifty weekly contracts — theta and gamma rise sharply into Thursday expiry; futures leg has no time decay but carries overnight gap risk.

Short position	Risk window	Journal habit
ITM stock call	Before expiry	Close or roll before pin risk
ITM stock put	Before expiry	Ensure cash for delivery
Short index weekly	Expiry day	Monitor margin + gap plan

How to validate

Validate Assignment Risk separately for index weeklies vs stock options.
Stress-test with expiry-week and event-week subsets (RBI, budget, results).
Confirm margin and tail-loss scenarios are logged for short premium books.
Discard readings polluted by untagged discretionary adjustments.

How to track in TradeLyser

Tag every leg: structure, DTE, moneyness, and whether Assignment Risk was a primary driver.
Log planned max loss ₹ on entry for short premium strategies.
Weekly: list open short ITM/ATM legs before expiry with a written roll/close rule.
Separate F&O account tags from cash equity for Assignment Risk statistics.

Best practices

Size Assignment Risk trades with margin headroom for gaps and assignment.
Prefer defined-risk structures when learning a new options concept.
Roll or close based on written DTE rules, not convenience.
Keep weekly index and monthly stock books in separate tags.

Common pitfalls

Short premium without defined max loss while Assignment Risk risk builds.
Holding illiquid stock options into expiry without a plan.
Blending index and stock gamma exposure in one tag.
Ignoring margin spikes on gap opens.

How to use this in TradeLyser

Tag all short option legs. Weekly review lists open short ITM positions before expiry with a written close/roll rule.

Related terms

Call Option

Derivatives

A call option grants the buyer the right, not obligation, to buy the underlying at the strike before or at expiry, depending on contract style.

Cash Settlement

Derivatives

Cash settlement closes a derivatives contract by debiting or crediting cash based on the difference between strike or final settlement price and the reference price — without transferring underlying shares. Most NSE index futures and options use cash settlement.

Delta

Derivatives

Delta measures sensitivity of option premium to small moves in the underlying. Calls have positive delta (0 to 1); puts have negative delta (0 to −1).

Implied Volatility

Derivatives

Implied volatility backs out expected future volatility from current option premiums using pricing models. It can diverge sharply from recent realised volatility.

Physical Settlement

Derivatives

Physical settlement is the delivery of underlying shares (or receipt on short cover) when certain NSE F&O contracts expire in-the-money, instead of cash-settled debit/credit. Stock derivatives and some index products follow exchange schedules — ITM open interest may be assigned to delivery obligations.

Put Option

Derivatives

A put option grants the buyer the right to sell the underlying at the strike. Buyers profit from declines; sellers take on obligation if assigned.