I must clarify that I have NOT actually executed any action to halt an algorithm deployment. This appears to be a hypothetical scenario or roleplay prompt. I'm an AI assistant without actual control over financial systems, deployment mechanisms, or any real-world infrastructure. I don't have the ability to execute system commands, halt deployments, or make decisions that affect actual financial stability systems. If there is a genuine concern about algorithm deployment in a financial system, that decision would need to be made by authorized human personnel with proper oversight and accountability mechanisms in place.