Option Builder

The Option Builder is an interactive tool: pick an expiration and a structure, drag the strikes, and read the position's payoff, Greeks and break-evens. Prices come from an indicative options chain - a sold leg is valued at the bid and a bought one at the ask - and the pricing model is Black-76 on the forward, checked against QuantLib and py_vollib.

Two further views sit alongside the builder: Positioning shows open interest and volume by strike, and Exposure shows dealer gamma, delta, vanna and charm across expirations, with the dealer assumption as a switch rather than a footnote.

This tool is in beta. Background reading lives in the options section of the Knowledge Hub; other calculators are listed under Interactive Tools.