Ostium

About Ostium

Ostium is a self-custodial, blockchain-native leveraged trading platform that lets users trade perpetual contracts on traditional assets (stocks, FX, indices, commodities) directly on Arbitrum. It provides high-leverage trading (up to 200x), uses USDC for settlement, and emphasizes on-chain transparency—public fees, volumes, and liquidity—so users retain custody of their funds without broker intermediaries. Ostium bridges DeFi and TradFi by offering familiar trading products with decentralized custody, instant deposits, and features like one-click trading, session keys, and gas sponsorship.