Nadex Amends the Maximum Bid/Ask Spread of the Underlying GBP/JPY Midpoints Used in the Expiration Value Calculation of its GBP/JPY Contracts, and Delists the Narrow Spread Contracts and Adds Intraday Spread Contracts for certain product classes


Pursuant to Section 5c(c)(1) of the Commodity Exchange Act, and Commission Regulation §40.6(a), Nadex amends the maximum bid/ask spread of the underlying GBP/JPY midpoints used in the expiration value calculation of its GBP/JPY Variable Payout and Binary Contracts (Rules 12.40 and 12.41), adjusts the Reporting Level and Position Limit in its Silver Variable Payout Contracts (Rule 12.6), and adjusts the Cap, Floor, Dollar Multiplier, Minimum Tick value, Reporting Level, and Position Limit in its Natural Gas Variable Payout Contracts (Rule 12.10). Additionally, Nadex also delists the Variable Payout Narrow Spread Contracts and adds Intraday Variable Payout Spread contracts to the Copper, Gold, Silver, Crude Oil, Natural Gas, FTSE 100®, Germany 30, US 500, US SmallCap 2000, US Tech 100, and Wall Street 30 Variable Payout Contracts (Rules 12.2, 12.4, 12.6, 12.8, 12.10, 12.48, 12.50, 12.58, 12.60, 12.62, 12.64). These Rule amendments will be effective for the start of business on trading day Monday, June 20, 2011.

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