Definitive guide · Options problem-solving resource
Options assignment help: the mechanics in plain language
Options assignment means the seller of a short option is selected to fulfill the contract after an option holder exercises. A short call can involve delivering shares at the strike; a short put can involve buying shares at the strike. Account treatment depends on the contract and broker.
Exercise and assignment are different events
The holder exercises a right. The writer receives a notice and must meet the written obligation. A clearing process allocates notices, and a brokerage then allocates them under its stated procedure.
Three questions to answer
- What would the assigned contract require in shares or cash?
- What happens to buying power, margin, liquidity, or other legs?
- What deadlines and broker-specific instructions apply?
Worked example
One short put at a $50 strike with a 100-share multiplier has a $5,000 gross strike-value example before premium, fees, taxes, rules, or market movement. That arithmetic does not predict assignment or account capacity.
What this page cannot tell you
It cannot determine likelihood, broker cutoff times, buying-power treatment, tax outcome, or spread handling. Confirm those with current official documentation and your broker.
Interactive planning tool
Estimate the contract obligation
Use simple contract math to frame a conversation with your broker. This is not a margin, buying-power, or probability calculator.
The standard contract multiplier is commonly 100 shares, but terms can vary. Confirm contract specifications and account treatment with your broker.
Primary reading: OIC exercise and assignment overview · SEC Investor Bulletin · FINRA assignment guide