What it does
Ostium focuses on bringing traditional-market exposure into a wallet-based trading flow. Positions use USDC on Arbitrum; the current protocol explanation combines an onchain vault with an offchain hedge rather than a central-limit order book.
The important comparison with a broker is the contract, not just custody. A perpetual gives derivative exposure, not ownership of a stock. Opening costs, rollover charges, market hours and day-trading rules can materially change a position that looks identical on a price chart.
Where it stands out
- A focused set of traditional-asset and crypto markets.
- Public references cover market hours, costs and the vault/hedging relationship.
What you can do
- 01Stocks, forex, commodities, indices and crypto perpetuals
- 02USDC collateral and OLP vault
- 03Trading SDK and market-data APIs
Who’s behind it
The official site identifies Ostium Labs Co. and lists General Catalyst, Coinbase Ventures and trading firms among its backers. The product documentation describes separate trader, vault and hedging roles.
Fees & availability
Fees and costs
Opening, oracle, rollover and liquidation fees depend on the market and action. Read the current fee reference and each instrument’s trading hours.
Eligibility and availability
Traditional markets can have trading-hour and day-trading constraints. Vault exposure includes the protocol’s hedging and loss-allocation design; U.S. and other restricted users must check the terms.