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Founded 2013
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CoinMarketCap is a cryptocurrency industry utility that reports recent traded prices for hundreds of cryptocurrencies traded on hundreds of platforms around the world. For each currency it reports the total value of the outstanding currency (the "market capitalization"), its total trading volume and its rank by trading volume over the past month and the past 24 hours.[1]

The integrity of CoinMarketCap's data reporting was excoriated in a widely publicized March 19, 2019, presentation to the U.S. Securities and Exchange Commission by Bitwise, an asset management firm with a pending application to the SEC for a bitcoin ETF. Bitwise alleged that only ten exchanges of the hundreds currently reported by CoinMarketCap provided credible data for bitcoin.[2]

On May 1, 2019, CoinMarketCap announced the formation of the Data Accountability & Transparency Alliance (DATA), uniting leading exchanges to enhance data reporting. To participate in DATA exchanges must provide live trading and orderbook data to CoinMarketCap. Binance, Bittrex, OKEx and Bitfinex are among the twelve inaugural members. CoinMarketCap also announced that it was launching its own block explorers for bitcoin and Ethereum.[3]