Short options
How does the probability of expiring worthless (POP) guide short option selection?
By Easy Money Scanner · Educational reference · Not investment advice
The short answer
Probability of expiring worthless, often estimated using delta, is used by some short-premium sellers to gauge the likelihood a sold option will not be in-the-money at expiration, helping compare strike choices for a given risk tolerance.
How it works
A lower delta generally corresponds to a higher statistical probability of expiring worthless, though this is a model-based estimate derived from current implied volatility, not a guaranteed outcome.
An example
A trader comparing a 0.16-delta put to a 0.30-delta put might view the 0.16-delta option as having a roughly higher chance of expiring worthless, accepting lower premium in exchange.
Risk & limitations
OCC and OIC materials caution that delta-based probability is a theoretical approximation under certain pricing assumptions, not an exact statistical guarantee of outcome.
Examples are hypothetical, not trade recommendations. US contract and regulatory references do not automatically apply in Canada. Rules, margin requirements and broker policies can change; confirm them with the relevant authority and your broker.