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What are the AON, OPG, and CLO order instructions?

Updated over 10 months ago

These qualifiers help tailor the execution of your trades based on your specific needs and market conditions.

AON (All-or-None):

  • This qualifier ensures that no partial transaction is executed. The order must be filled entirely or not at all.

  • Applicable for orders greater than 100 shares.

  • Not available for NYSE-listed symbols.

OPG (At-the-Open):

  • Also known as Market-on-Open (MOO)

  • Requests the order to be executed at the official opening price of the primary listing exchange.

  • Orders must be received before 9:15 AM (ET).

  • After 9:28 AM, OPG orders cannot be edited or canceled.

  • Unfilled orders after the market opening are canceled.

CLO (At-the-Close):

  • Also known as Market-on-Close (MOC)

  • Requests the order to be executed as close to the closing price as possible.

  • Orders must be placed before 3:40 PM (ET).

  • CLO orders cannot be edited or canceled after 3:45 PM (ET).

  • Unfilled orders after the market close are canceled.

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