The U.S. voluntary moratorium on nuclear explosive testing, in place since 1992, continues to shape trader consensus around low probabilities for a detonation by late 2026 despite President Trump's October 2025 directive to resume testing on parity grounds with Russia and China. Congressional resistance remains firm, with lawmakers citing annual stockpile stewardship certifications that affirm no explosive testing is required for reliability. The most recent catalyst is the National Nuclear Security Administration's late-September 2026 non-nuclear chemical high-explosive experiment at the Nevada National Security Site, which focused on refining detection algorithms for low-yield or decoupled foreign tests rather than advancing U.S. explosive activities. Technical assessments from agency leaders and laboratories reinforce that subcritical and simulation-based methods suffice, while procedural and diplomatic hurdles further constrain near-term resumption.