Nadex Adds Additional Strike Levels on a Discretionary Basis on Trade Date October 23, 2012

Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, and Commission Regulation §40.6(d)(2)(iv), and by the authority granted by Nadex Rules in 12.51, 12.59, 12.61, 12.63 and 12.65,Nadex added additional strike levels on a discretionary basis in its Daily Wall St 30, US Tech 100, Germany 30, US 500, US SmallCap 2000 Binary Contracts for Trade Date October 23, 2012 due to volatility in the underlying markets on that day. Nadex returned to its regular listing schedule for these contracts on October 24, 2012.