CME Globex follows a specific set of rules to determine the TOP:
Rule 1: Determine the maximum matching quantity at a price level
Rule 2: Determine the minimum non-matching quantity
Rule 3: Determine the highest price if non-matching quantity is on the buy side for all prices
Rule 4: Determine the lowest price if non-matching quantity is on the sell side for all prices
Rule 5: Determine the closest price to the settlement price (reference price)
Rules are applied in a hierarchy from Rule 1 through Rule 5. The TOP is determined by whichever rule best applies to the order book at that moment.
Content Tools