Only 141 of 95,876 AI agents have a tested halt mechanism.
An untested halt is an assumption. Of 95,876 AI agents in 543 regulated financial institutions, 5,530 carry a halt mechanism described as plausibly or self-assertedly tested. Only 141 carry one with documented evidence of testing. That is 0.15 percent of the agent population. The remaining 99.85 percent operate on the presumption that a brake the institution has not exercised will work the moment it is needed.
The figure shows the three-stage funnel from the full agent population to the subset with documented evidence of halt-mechanism testing. Each bar is sized proportionally; the bottom bar is held at minimum visibility and remains barely discernible at full proportional scale because 141 sits against 95,876. An untested halt is an assumption made under regulatory pressure. DORA Article 11 and EU AI Act Article 14 require demonstrable, exercisable halt capability, not the existence of a procedure on paper.