The Bit Capital Index 30 and the Bit Capital Index 150 (known as the BCI) are a set of indexes released by Bit Capital Vendor in April 2018 to reflect the overall picture of the cryptocurrency exchange market. The BCV group uses an objective and scientific method to calculate BCI. After eliminating stable currencies, it selects the cryptocurrency with the largest market cap and the best liquidity in qualified exchanges and uses the calculation method of the market-valued weighted index to show the changes of the overall market value.