Nadex Adds Strikes on a Discretionary Basis in its Gold Daily Binary Contracts for Trade Date September 7, 2011 and in its Wall St 30, US 500, US Tech 100, US 2000, and Germany 30 Daily Binary Contracts for Trade Date September 9, 2011 Only

298.091211

Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, Commission Regulation §40.6(c), and Nadex Rules 12.5(f)(vii), 12.65(f)(x), 12.59(f)(x), 12.63(f)(x), 12.61(f)(x), and 12.51(f)(ix), has added twenty-three additional strike levels on a discretionary basis in its Gold Daily Binary Contracts for trade date September 7, 2011, fifteen additional strike levels in its Wall Street 30 and US 500 Daily Binary Contracts, eleven additional strike levels in its US Tech 100 and US 2000 Daily Binary Contracts, and five additional strike levels in its Germany 30 Daily Binary Contracts for trade date September 9, 2011 only, due to volatility in the underlying markets on those days.

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