Nadex Adds Additional Strike Levels on a Discretionary Basis on Trade Dates June 19 and 21, 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 12.5, 12.7, 12.13, 12.59, 12.61, 12.63, and 12.65 Nadex added additional strike levels on a discretionary basis in its Weekly Corn Binary Contracts on trade date June 19, 2012 due to volatility in the underlying markets on that day. Nadex plans to return to its regular listing schedule for these contracts on June 25, 2012. Nadex also added additional strike levels on a discretionary basis in its Daily Gold, Silver, US Tech 100, Wall Street 30, US 500, and US SmallCap 2000 Binary Contracts for trade date June 21, 2012 due to volatility in the underlying markets on that day. Nadex returned to the regular listing schedule for these contracts on June 22, 2012.