Instrument categories

Categories align with common institutional API product types. Naming below mirrors how partners already think about venues such as Bybit V5-style markets.

Linear

Type	Description	Typical quote
Linear perpetual	Perpetual swaps settled in stablecoin	USDT / USDC
Linear futures	Dated futures settled in stablecoin	USDT / USDC

Linear USDT perpetuals are the core of the live Eterna retail trade experience, including stock-tagged markets (tokenized equities / xStocks-style symbols).

Inverse

Type	Description	Typical settle
Inverse perpetual	Coin-margined perpetual	Base coin (e.g. BTC)
Inverse futures	Coin-margined dated futures	Base coin

Inverse inventory is listed in the catalog for brokerage and advanced venue coverage.

Spot

Spot pairs (base/quote) for cash markets. Documented as brokerage availability unless explicitly enabled on a partner's live surface.

Options

Option contracts (calls/puts) where inventory is enabled for the partner. Documented for completeness of the institutional product set; enablement is scoped per commercial agreement.

Symbol conventions

• Perpetuals often look like BTCUSDT, ETHUSDT
• Stock-tagged linears may appear as equity tickers with a USDT quote (e.g. TSLAUSDT)
• Inverse symbols commonly use USD quote naming (e.g. BTCUSD)

Exact filters, lot sizes, and leverage bounds are returned by market-data endpoints at runtime - see Market data API.