Trade Cancellation Notice

On September 30, 2011 the following trades occurred in the US 500 Bull Spread Contracts:

• At 1:30:39 ET, a trade occurred in the US 500 (Dec) 1130.0-1160.0 (4:15PM) Bull Spread contract for 1 contract at a price of $1159.50;

• At 1:31:14 ET, a trade occurred in the US 500 (Dec) 1130.0-1160.0 (4:15PM) Bull Spread contract for 1 contract at a price of $1159.50;

• At 1:31:26 ET, a trade occurred in the US 500 (Dec) 1140.0-1180.0 (4:15PM) Bull Spread contract for 1 contract at a price of $1177.00;

• At 1:30:48 ET, a trade occurred in the US 500 (Dec) 1160.0-1200.0 (4:15PM) Bull Spread contract for 1 contract at a price of $1183.70.

Pursuant to the authority granted by Nadex Rule 5.14, Nadex has cancelled these trades.