Nadex Adds Strikes on a Discretionary Basis in its Daily Commodities, Currencies, and Indices Binary Contracts for Trade Dates September 22, 2011 and September 23, 2011 Only

Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, Commission Regulation §40.6(c), and Nadex Rules 12, Nadex has added additional strike levels on a discretionary basis in its Daily Silver, Gold, EUR/USD, USD/CAD, Germany 30, FTSE 100, US 500, US Tech 100, US SmallCap 2000, and Wall Street 30 Binary Contracts for trade date September 22, 2011, and in its Daily Silver, Gold, US 500, US Tech 100, US SmallCap 2000, and Wall Street 30 Binary Contracts on trade date September 23, 2011 only, due to volatility in the underlying markets on those days.