According to @CoinMarketCap, CMC20 is a fully on-chain index that tracks the top 20 cryptocurrencies, is rebalanced monthly, and is designed to be transparent and tradable to provide broad market exposure. Source: @CoinMarketCap. @CoinMarketCap stated the index entered the market in November and is built for everyone, offering a tradable on-chain vehicle to access the market’s top-cap assets. Source: @CoinMarketCap.