crypto20 has announced that the C20 token will be listed on HitBTC on 15th January 2018. They have also listed on the etherdelta decentralised exchange. Crypto20 is one of the first cryptocurrency index funds to issue a token. It is closed fund and analogous to an investment trust. It can trade a premium to its Net Asset Value (NAV) if there is demand.
The author has investments in C20.