Periodic Auctions Port Attributes

The Default CrossTradeFlag port attribute enables Members to designate all orders sent on a port as either Periodic Auction Only or Periodic Auction Eligible using CrossTradeFlag = 1 or 2.

• If this port attribute is set, CrossTradeFlag = 0 can be used to override the port setting on an order-by-order basis.
• When set to 2:
  • IOC, FOK, and displayed orders are not converted to a Periodic Auction Eligible order and are sent to the book as-is.
  • DisplayIndicator (9479) will be ignored if ExecInst (18) = m or M.
• When set to 3:
  • IOC, FOK, IOC/FOK orders with ExecInst (18) = M, and all other orders where ExecInst (18) does not = m will not be converted and will be sent to the book as-is.
  • All non-IOC/FOK orders with ExecInst (18) = M will be converted to RHO Midpoint Peg - Periodic Auction Only orders.
• Orders with the following RPI instructions will set this port attribute to 0:
  • ExtendedExecInst (9416) = R or P, plus is an IOC, or ExtendedExecInst = T.

The Lock Auction Orders port attribute allows Members to configure whether orders that are participating in a Periodic Auction may be cancelled. A value of False (default) will allow cancellations to occur during a Periodic Auction.

All port attributes may be updated by using the Logical Port Request tool located within the Customer Web Portal.