Attention - Important Notice

In accordance with our Terms of Service:
  • Persons that are at any time located in or a resident of the United States of America or Québec (Canada) are prohibited from holding positions or entering into contracts at BitMEX.
  • Persons that are at any time located in or a resident of Cuba, Crimea and Sevastopol, Iran, Syria, North Korea and Sudan, or any other jurisdiction where the services offered by BitMEX are restricted, are prohibited from holding positions or entering into contracts at BitMEX.
  • BitMEX reserves the right to immediately close the accounts and to liquidate the open positions of persons determined to have breached our Terms of Service.
AllXBTUSD4513.0-2.74%XBTH194483.5-2.82%XBTZ184483.0-2.86%XBT7D_U1050.00026-62.32%XBT7D_D950.01424+3.79%ADAZ180.00001028-1.06%BCHZ180.0504-1.18%EOSZ180.0008244+0.89%ETHUSD133.50-5.05%ETHZ180.02929-1.41%LTCZ180.00732-0.81%TRXZ180.00000319-1.24%XRPZ180.00009525+1.52%.BXBT4515.43-2.76%.BETH133.39-4.91%.BVOL24H9.45+11.83%Funding: 03:16:50 @ -0.0657%Time: 4:43:09 PM
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 8:00 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 receive 0.0657%, and shorts will pay 0.0657% at 8:00 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 = -0.0657%
F = -0.1157% + Clamp(0.0100% - -0.1157%, -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 Rate-0.0657%
Funding Intervalevery 8 hours
Next FundingNov 21, 2018, 8:00:00 PM
Predicted Rate-0.0040%
Mark Price4514.21
Auto-Deleveraging EnabledYes: This contract is highly speculative and manages loss through auto-deleveraging.
Mark MethodFairPrice
Fair Basis-1.22
Fair Basis Rate-71%
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 Interest331,467,750
24H Turnover1,010,090.2990 XBT
Total Volume911,943,083,200
TypeSettled in XBT, quoted in USD
Contract Size1 USD (Currently 0.00022152 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