Nadex Amends Listing Hours for US Indices for December 27, 2011 and January 3, 2012; FTSE 100® and Germany 30 Contracts Will Not Be Listed on December 30, 2011

In order to conform to the listing schedule of the underlying products upon which the Nadex derivatives are based, the Wall St 30, US Tech 100, US 500, and US SmallCap 2000 will open at 6:00am ET on December 27, 2011 and January 3, 2012 and close at their regular times on these dates. Nadex will return to its regular listing schedule these products for trade dates December 28, 2011 and January 4, 2012, respectively.

Additionally, Nadex will not list any FTSE 100® or Germany 30 contracts on trade date December 30, 2011. Weekly Germany 30 contracts will settle on Thursday, December 29, 2011, in accordance with the Nadex Holiday Product Schedule Guidelines . No FTSE 100® weekly contracts will be offered for the week of December 26, 2011, due to the holidays on December 26, 27 and 30, 2011.