Q. For price adjustments made under section (a)(1)(ii), the rule requires written notification to customers within fifteen minutes. If the liquidity provider informs an FDM of the price change twenty minutes after the orders are executed, can the FDM still make the adjustment?
A. No. The rule provides that customers must be notified within fifteen minutes after their orders are executed, and it was written that way intentionally. Since a customer's subsequent trading decisions may be based on the customer's belief that a particular trade was executed at a particular price, the rule provides a narrow window for price adjustments.