The BitMEX Trading Challenge II concludes before the settlement of XBTZ14, USDZ14, XLTZ14, and XDKZ14 futures contracts. The settlement price will be defined by the following function:
Z14 Settlement Price = U14 Settlement Price * (1 + r_f * t) / (1 + r_d * t)
U14 Settlement Price = The September 26, 2014 settlement price for the futures chain in question.
r_f = The daily flash return rate as observed on Bitfinex of the foreign currency on September 26, 2014.
r_d = The daily flash return rate as observed on Bitfinex of the domestic currency on September 26, 2014.
t = Days between December 26 and September 26 2014 divided by 365.
Note: XDK will use the XLT flash return rate.