Nadex Amends the Payout Criteria for Certain Event contracts and Deletes Duplicate 12-2pm USD/YEN Intraday Event Contract Rules

Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, and Commission Regulation §40.6(a), Nadex amends the payout criteria, including the strike width and rounding values, for certain Event contracts and deletes duplicate 12-2pm USD/YEN Intraday event contract rules. These rule amendments are effective for the start of business on trading day Monday, March 15, 2010.