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Auction Orders

For more information on the following Auction Only Orders, please see the Cboe Titanium U.S. Options Opening Process.

Table 1. Auction Only Orders
Order TypeOrder Entry Details
Market-On-Open (MOO)OrdType = 1 (Market)TimeInForce = 2 (At the open)
Limit-On-Open (LOO)
  • OrdType = 2 (Limit)
  • Price = [price]
TimeInForce = 2 (At the open)
Settlement Liquidity On Open (SLOO)
  • OrdType = 2 (Limit)
  • Price = [price]
  • TimeInForce = 2 (At the open)
  • ExecInst = r (Settlement Liquidity)
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Cboe Titanium U.S. Options BOEv3 Specification - Auction Orders | Cboe