Deribit BTC Index
Currently the Deribit BTC index is made up the latest prices from Bitstamp, Gemini, Bitfinex, Itbit, GDAX(coinbase) and Kraken. From those 6 exchanges Deribit retrieves continuously best bid and best ask prices and calculates the mid price. Then the highest and lowest price are taken out. The remaining 4 exchanges are then each for 25% accountable for the BTC price index. So at all times there are a maximum of 4 exchanges making up the BTC price index weighting each 25%.
There is a page dedicated to the price index where you can see at any time which exchanges are actually part of the index at this very moment. (https://www.deribit.com/main#/prinx_chart)
If we don’t receive any signal from an exchange for more than 3 minutes, this exchange will be taken out of the index calculation. If deribit can only receive real time data from 1 or 2 exchanges, those will make the index, though, if ever, this would occur very rarely.
Please note that the composition of the Deribit BTC Index could change if Deribit management decides so. The purpose of the Index is to represent the actual USD price traded on the biggest exchanges. If an exchange has prices consistently out of line with the majority of other exchanges, the exchange might be taken out of the Index, with or without substitution by another exchange. This guarantees that Deribit Index remains healthy, representing current USD value of Bitcoin as good as possible at all times. Also if an exchange delays withdrawals or is hardly accessible, it might be taken (temporary) out of the index. Also it could happen that we add additional exchanges to the Deribit BTC Index.
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