The BitMEX QTUM / Bitcoin 29 September 2017 Futures Contract, QTUMU17, will expire on the .QTUMXBT30M Index. The index will use the Bittrex QTUM/XBT price.
Effective 26 September 2017 12:00 UTC, QTUMU17 will use Fair Price Marking and the + / – 25% Limit Up / Down will be removed.