The CME CF Bitcoin Real Time Index (BRTI) is a once a second benchmark index price for Bitcoin that aggregates order data from Bitcoin-USD markets operated by major cryptocurrency exchanges that conform to the CME CF Constituent Exchange Criteria. Calculated every second, it is the most precise source for Bitcoin pricing and the pre-eminent price benchmark for real time valuations being a Registered Benchmark under EU BMR. The BRTI is a collateral valuation mechanism for trading on Kraken Futures.