Calendar & diagonal spreads
How do I calculate the Maximum Profit and Maximum Loss zones for a standard neutral Calendar spread?
By Easy Money Scanner · Educational reference · Not investment advice
The short answer
A standard long calendar's maximum loss is generally limited to the net debit paid, while maximum profit, which cannot be known exactly in advance, is estimated using an options pricing model at the short option's expiration.
How it works
Because the long option's value depends on remaining implied volatility, calendar max profit is a model-based estimate rather than a fixed value, unlike simpler defined-risk verticals.
An example
A trader pays a $200 net debit for a calendar spread; that $200 is the maximum loss, while an options pricing calculator estimates potential profit near the current price at front-month expiration.
Risk & limitations
Model-estimated max profit assumes implied volatility stays constant, which rarely holds exactly; actual profit can be lower or higher than the model's single-scenario estimate.
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.