Synthetix is a derivatives liquidity protocol on Ethereum that enables the issuance and trading of synthetic assets. Each synthetic asset (or Synth) is an ERC20 token which tracks the price of an external asset; for example, each sUSD token tracks the price of the US dollar (and unlike the other synthetic assets, is fixed at 1). A wide variety of Synths exists within Synthetix, including fiat currencies, cryptocurrencies, commodities, and inverse indexes. In principle, the system can support any asset with a clear price and provides on-chain exposure to an unlimited range of real-world assets.