Methods and systems are provided which enable options broker-dealers to guarantee execution of an option trade order within a specified time window. By providing means to quantify and mitigate the effects of several factors which contribute to options market inefficiency (e.g., market structure, regulatory constraints, and "market misbehavior"), these methods and systems eliminate or at least reduce the level of broker-dealer risk inherent in offering an execution speed guarantee, while optionally simultaneously providing better execution quality for investors.