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AllXBTUSD3955.0+0.11%XBTH193952.5+0.14%XBTM193941.0+0.23%XBTU193940.0+0.04%XBT7D_U1050.00642+53.59%XBT7D_D950.00181-21.30%ADAH190.00001253-0.40%ADAM190.00001271-0.86%BCHH190.0398-0.50%BCHM190.0404+0.00%EOSH190.0009333-0.80%EOSM190.0009451-0.20%ETHUSD136.80-0.15%ETHH190.03471-0.20%ETHM190.03484-0.34%LTCH190.01475-0.47%LTCM190.01493-0.33%TRXH190.00000569-1.73%TRXM190.00000574-2.38%XRPH190.00007936-0.75%XRPM190.00008037-0.63%.BXBT3958.13+0.08%.BETH136.79-0.10%.BVOL24H0.92-26.40%Funding: 03:34:12 @ 0.0100%Time: 8:25:47 AM
XBTUSD: Contract Specification
The base currency is XBT.
The quote currency is USD.


XBTUSD is a XBT/USD perpetual contract priced on the .BXBT Index. Each contract is worth 1 USD of Bitcoin.

Funding is paid and received every 8 hours. The next payout event is at 12:00 PM UTC.

XBTUSD uses a Premium Index to calculate funding rates. The underlying interest rates are quoted in the .XBTBON8H Index and .USDBON8H Index, and the premium rate is quoted in the .XBTUSDPI8H Index. These are used to calculate the final funding rate.

Today, longs will pay 0.0100%, and shorts will receive 0.0100% at 12:00 PM UTC. BitMEX does not charge fees on funding payments.

Expiry: This instrument is perpetual and does not expire.

View the XBT Series Guide

Funding Calculation

More information about the funding rate is available in the Perpetuals Guide.

Interest BaseInterest QuotePremium

I = Interest Rate, B = Interest Base, Q = Interest Quote, T = Funding Times Per Day
P = Premium Rate, F = Funding Rate
The Funding Rate is the rate exchanged between users.
The Premium Rate is used to calculate it, adjusted by the Interest Rate by up to 0.05%.


I = (Q - B) / T
F = P + Clamp(I - P, -0.05%, 0.05%)


I = 0.0100%
I = (0.06% - 0.03%) / 3
F = 0.0100%
F = -0.0355% + Clamp(0.0100% - -0.0355%, -0.05%, 0.05%)

Full Contract Details

Ticker RootXBTUSD
Expiry DatePerpetual
Initial Margin1.00% + Entry Taker Fee + Exit Taker Fee
Maint. Margin0.50% + Exit Taker Fee + Funding Rate
Interest Base Symbol.XBTBON8H
Interest Quote Symbol.USDBON8H
Funding Premium Symbol.XBTUSDPI8H
Funding Rate0.0100%
Funding Intervalevery 8 hours
Next FundingMar 19, 2019, 12:00:00 PM
Predicted Rate-0.0005%
Mark Price3958.31
Auto-Deleveraging EnabledYes: This contract is highly speculative and manages loss through auto-deleveraging.
Mark MethodFairPrice
Fair Basis0.18
Fair Basis Rate10%
Fair Basis CalculationThe fair basis on this instrument is determined by an annualized calculation of the funding rate.
Risk Limit200 XBT
Risk Step100 XBT
Open Interest512,441,429
24H Turnover157,748.8543 XBT
Total Volume1,070,658,662,812
TypeSettled in XBT, quoted in USD
Contract Size1 USD (Currently 0.00025263 XBT per contract)
SettlementThis contract is perpetual and does not settle.
CommissionSee the Fees Reference for more details.
Minimum Price Increment0.5 USD
Max Price1,000,000
Max Order Quantity10,000,000
Lot Size1