The United States has observed a voluntary moratorium on nuclear explosive testing since 1992, with no such detonation reported through early October 2026. Recent developments center on a September 30 non-nuclear chemical high-explosive experiment at the Nevada National Security Site designed to refine detection of low-yield or decoupled foreign tests, alongside confidential diplomatic pressure on China over alleged past activities at Lop Nur. Administration statements have framed any potential U.S. resumption as conditional on parity with other powers, without advancing concrete preparations or timelines for an actual test. Trader consensus reflected in current pricing assigns low implied probabilities to near-term U.S. explosive testing, consistent with the absence of site activity, congressional dynamics, and the focus on verification capabilities rather than stockpile detonation.