Nadex Adds Additional Strike Levels on a Discretionary Basis on Trade Date February 22, 2013 and Amends the Definitions of “Financial Institution” and “Intraday Contracts” in its Rulebook

Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, and Commission Regulation §40.6(d), and by the authority granted by Nadex Rules in 12.15, Nadex added additional strike levels on a discretionary basis in its Weekly Soybean Binary Contracts on trade date February 21, 2013. Nadex plans to return to its regular listing schedule for these contracts on February 25, 2013.

Additionally, Nadex is amending the citation in its Rule 1.1(o) to the definition of “Financial Institution” in the Department of Treasury’s regulations.

Finally, Nadex is amending its definition of “Intraday Contracts” in Rule 12.1(s) to clarify that an Intraday Contract is one which expires on the same trade date as, and within eight hours or less, of issuance.