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Contract CodeUSDT-BTC
Underlying Index Price• Stablecoin leg: USDT/USD spot price from Binance / Pyth
• BTC Price: 3-venue 4-hour VWAP spot composite of Binance (BTC/USDT); Pyth (BTC/USD); Coinbase (BTC/USD).
Contract SizeNotional of 1,000 USDT, quoted & settled in BTC
Quote / P&L CurrencyBTC
Tick Size0.000001
Trading Hours24 / 7 continuous order book.
Mark-Price Construction**Mark Price = median(P¹, P², P³), Where: **
Price 1 (P¹) = Index Price × 1+LastFundingRate×(TimeUntilFunding/8)
Price 2 (P²) = Index Price plus a rolling 2.5-minute average basis, where the basis is defined as (Bid1 + Ask1)/2 − Index Price.
Price 3 (P³) = Last traded price.
Funding Snapshots00:00 UTC • 08:00 UTC • 16:00 UTC (every 8 h)
Funding-Rate FormulaPremium Index + Interest Rate; Interest Rate = 0.03% / day (0.01% / 8 h). Caps ± 3 % per 8 h.
Leverage & MarginMax Leverage 10x; Maintenance margin 25% of Initial Margin.
Liquidation Logic• Trigger when Equity < MM.
• For long positions = Entry Price × (1−Initial Margin Rate + Maintenance Margin Rate)
• For short positions = Entry Price × (1 + Initial Margin Rate - Maintenance Margin Rate)
Order Types / TIFLimit, Market, GTC, GTD, IOC.
Min / Max Order SizesMarket Max: 0.5 BTC
Limit Max: 0.5 BTC