SDX (Solana Derivatives Exchange) is a DeFi Option Automated Market Maker (AMM) that aims to establish a new trading venue for crypto options. On SDX, users are able to buy and sell fully-collaterized, cash settled European options, including calls, puts and vertical spread strategies. Users also can participate as a market maker by supplying assets to AMM Pools, and earn passive yield from bid-ask spread fees and capital utilization fees.