マウントゴックス
The CoinDesk Bitcoin Price Index (CoinDesk BPI) was launched in September 2013. The Bitcoin Price Index is an average of bitcoin prices across bitcoin exchanges, and began by using price data from Bitstamp, BTC-e and CampBX. Although Mt. Gox data was not used initially, due to withdrawal concerns for US customers, in November 2013, Mt. Gox was added to the BPI due to "a reduction in the risk premium and the option of additional deposit/withdrawal methods". The Mt. Gox bitcoin exchange was eventually removed from the index in February 2014 after its "persistent failure to meet the index's standards for inclusion".