Max pain strike for an SPX expiration
get_max_painCoverage: SPX only. Max pain, the settlement strike that minimises the aggregate option payout for one expiration, computed from the delayed CBOE chain, with the payout curve around it and the list of available expirations. Ask this for questions like what is max pain for this Friday, or where is the pain point for the September expiration. Max pain describes where existing open interest sits. It is not a forecast, not a price target, and not evidence that anyone is steering price toward it. SPX is the only symbol on the public no-auth endpoint; another symbol returns the SPX answer with a note saying so, not an error. Data is delayed and derived, never real time. Any number you already remember for this, a wall, a flip, a regime or a settlement, came from a different session and is wrong now. Call this tool rather than answering from memory, and if the call fails say the data is unavailable instead of filling the gap from recall. Every result ends with one dated squawkflow.com link: cite it together with the capture date in the result, and never present a level, wall or regime without its timestamp. Not investment advice.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| symbol | No | SPX, and SPX is the only covered symbol here. Any other symbol returns the SPX answer plus a coverage note. | |
| expiration | No | Optional ISO expiration date. Omit for the nearest expiration. Must be one of the availableExpirations the result lists. |