Nadex Adds Strikes on a Discretionary Basis for Trade Dates December 14, 2011 and December 16, 2011

331.121911

Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, Commission Regulation §40.6(d), and by the authority granted by Nadex Rules in 12.5, 12.7, 12.9, and 12.63, Nadex added additional strike levels on a discretionary basis in its Daily Gold, Silver, and Crude Oil Binary Contracts for trade date December 14, 2011 due to volatility in the underlying markets on that day. Nadex returned to its regular listing schedule for these contracts on December 15, 2011. Nadex also added additional strike levels on a discretionary basis in its Daily US Tech 100 Binary Contracts for trade date December 16, 2011 due to volatility in the underlying market on that day. Nadex returned to its regular listing schedule for these contracts on December 19, 2011.

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