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Perpetual futures contract

A futures contract with no expiration date, which references an underlying asset’s price. Roxom’s perpetuals are linear contracts (contracts whose profit and loss change proportionally with price) quoted in BTC (price of the asset in BTC) and settled in BTC. Traders can hold positions indefinitely, subject to margin requirements and funding payments.

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Underlying asset and Index Price

Each contract has an underlying reference (e.g. PAX Gold (PAXG) and SPDR S&P 500 ETF Trust (SPY)). Roxom uses a composite Index Price for each underlying, sourced from major market data feeds, to serve as a fair reference. This Index Price (in USD) is combined with the BTC/USDT price to determine a fair price in BTC for the contract. (For each exact underlying asset and Index Price, please visit Our Contracts Offering and Specs).

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Mark Price

The fair price used for margining, funding‐rate calculations, and liquidations, derived from a combination of the underlying’s composite index and Roxom’s own order‐book data. For 24/7 contracts, the Mark Price updates continuously as new index quotes and order‐book information arrive; for market‐hours contracts, the Mark Price “freezes” outside the defined trading window (using the last valid index value) to prevent gap risk. All unrealized P&L, margin requirements, and liquidation triggers reference this Mark Price (rather than the last traded price) to guard against anomalous trades or manipulation, and the system suspends liquidations if the underlying index feed becomes stale or falls outside its regular trading hours.
Last modified on April 21, 2026