NASDAQ OMX has discovered a potential problem that could occur during the daily Closing Call Auction for Index Futures in CLICK. Under certain circumstances, altering an order during the Call Interaction Session State CLIN could unintentionally affect the order characteristics. Therefore, all the possibilities to change an order during CLIN will be disabled as of April 23, 2010, until the launch of Genium INET. During CLIN, alter order transactions will be rejected. The user must delete the existing order and enter a new one and thereby lose time priority and receive a new order number. For further information concerning this exchange notice please contact Gustaf von Boisman or Mikael Siewertz telephone +46 8 405 6000. Best regards, NASDAQ OMX Nordic