Recent diplomatic exchanges between Washington and Tehran have centered on Iran's uranium enrichment program, with U.S. negotiators pressing for a complete halt while Iranian officials maintain their right to limited civilian enrichment under international oversight. As of mid-May 2026, talks remain stalled on core issues including the duration of any moratorium and the disposition of existing stockpiles, following Iran's recent statements signaling readiness to increase enrichment levels amid ongoing ceasefire strains. Traders assign 96.5 percent probability to no agreement by the May 31 deadline because these positions have shown little convergence despite multiple rounds mediated through third parties. A last-minute shift could still occur if sanctions relief or verification terms are finalized in the remaining weeks, though historical patterns in similar negotiations indicate such rapid resolutions are rare without major concessions from both sides.