SYMMIO is a decentralized derivatives protocol introduces the concept of symmetrical contracts, a new trading primitive for facilitating on-chain OTC derivatives trading. SYMMIO is built on intent-centric architecture. A requesting party (PartyA) and a responding party (PartyB) are matched and a trade is executed when both parties commit collateral, locking them into an isolated, symmetrical trade. SYMMIO itself doesn't offer any trading or promotes the trading of any derivatives, SYMMIO only provides the infrastructure for peer to peer bilateral matchmaking, that can be used by 3rd party providers to build a fully functional on-chain derivatives exchange.