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Cboe Bitcoin Futures Contract will use the ticker XBT and will equal one bitcoin.

CME Bitcoin Futures Contract will use the ticker BTC and will equal five bitcoins.

Cboe’s and CME’s bitcoin futures contracts will be settled in U.S. dollars, allowing exposure to the bitcoin without actually having to hold any of the cryptocurrency.

Cboe’s contract will be priced off of a single auction at 4 p.m. Eastern time (2100 GMT) on the final settlement date on the Gemini cryptocurrency exchange.

CME’s contract will be priced off of the CME Bitcoin Reference Rate, an index that references pricing data from cryptocurrency exchanges, currently made up of Bitstamp, GDAX, itBit and Kraken.

Cboe’s contract a 30 percent margin rate will apply

CME’s contract a 35 percent initial margin rate.

Cboe will halt trading in its contract for 2 minutes if the best bid in the XBT futures contract closest to expiration is 10 percent or more above or below the daily settlement price of that contract on the prior business day.

Once trading resumes, if the best bid in the XBT futures contract closest to expiration is 20 percent or more above or below the daily settlement price of that contract on the prior business day, the futures will be halted for 5 minutes.

CME will apply price limits, also known as circuit breakers, to its bitcoin futures of 7 percent, 13 percent, and 20 percent to the futures fixing price.

>>> Trading will not be allowed outside of the 20 percent price limit.

https://www.coindesk.com/threat-bitcoin-futures/