• U.S. and Chinese delegations meet in Geneva this week for nuclear arms discussions following the expiration of the New START treaty with Russia on February 5, 2026.
  • U.S. officials accuse China of rapidly expanding its nuclear arsenal without transparency, projecting it could have fissile material for over 1,000 warheads by 2030.
  • China rejects trilateral talks, insisting the U.S. and Russia reduce their arsenals first, while the Trump administration pushes for multilateral negotiations.

U.S. and Chinese officials are holding nuclear arms talks in Geneva this week, aiming to address arms control in a new era after the New START treaty with Russia expired earlier this month. According to people familiar with the matter, the discussions are part of broader U.S. efforts to initiate multilateral negotiations that include China, whose nuclear expansion has raised alarms in Washington.

Assistant Secretary of State for Arms Control Christopher Yeaw recently criticized China's buildup at the Conference on Disarmament in Geneva, alleging a lack of transparency and projecting that China could have enough fissile material for over 1,000 warheads by 2030. "This isn't just about numbers; it's about strategic stability," one U.S. official said, speaking on condition of anonymity. Efforts to reach Chinese officials for comment were unsuccessful as of Tuesday.

Without a new agreement, analysts warn that the world could slide into an unconstrained arms race, with the U.S. and Russia no longer bound by treaty limits and China accelerating its capabilities. China has historically resisted trilateral talks, maintaining that its arsenal remains smaller than those of the U.S. and Russia and that it should not be subject to the same reductions. "We've seen this pattern before—posturing that complicates diplomacy," a European diplomat noted.

In the background, political dynamics add complexity. The Trump administration is pushing for what it calls a "better agreement" through multilateral talks, with President Trump reportedly open to bilateral deals if needed. Meanwhile, Russia has indicated it will maintain steady force levels if the U.S. does, though unconfirmed reports suggest "gentleman's agreement" talks may be underway. The situation is further strained by U.S. allegations of secret Chinese nuclear tests, detected via seismic signals, which China denies.

Market implications are indirect but significant, with global defense spending potentially affected by heightened tensions. A particular flashpoint is U.S. arms sales to Taiwan, risking a dispute over a $20 billion deal that could escalate if talks falter. "Every move here ripples through geopolitical and economic channels," an industry analyst observed.

Looking ahead, short-term outcomes remain uncertain. No confirmed interim measures, such as a warhead upload freeze, have been announced, and parallel bilateral talks with Russia might occur. Long-term, projections suggest China could achieve nuclear parity with the U.S. and Russia within four to five years, raising stakes for future negotiations. Experts urge technical discussions on verification to avoid miscalculation, but with mutual accusations flying, the path forward is fraught.

Correction: An earlier version misstated the date of the New START expiration; it was February 5, 2026.