But the company said it has no plans right now for ethereum futures, although the structure of the indexes is very similar to the ones behind CME's bitcoin futures.
"The focus right now is on the index itself," said Tim McCourt, managing director and global head of equity products and alternative investments at CME.
The two indexes launched Monday are the CME CF Ether-Dollar Reference Rate, which prints a daily price at 4 p.m. London time (11 a.m. ET), and the CME CF Ether-Dollar Real-Time Index. Prices of both indexes are calculated by UK-based exchange Crypto Facilities based on transaction data from Kraken and Bitstamp, two major cryptocurrency exchanges.