Market responses to signals of US-Iran progress reflect a pattern where diplomatic developments directly calibrate safe-haven demand across the yield curve, with cash trading resumption post-holiday amplifying moves in 2-year and 10-year notes. Primary documents such as the 2015 JCPOA text outline verification mechanisms that frame negotiation outcomes, while recent US Treasury daily yield curve releases document corresponding rate compressions tied to reduced escalation premia. Perspectives from Tehran emphasize sanctions relief as a precondition for compliance, contrasting Washington statements prioritizing non-proliferation benchmarks without immediate economic concessions. This integration of policy signals into real-time risk sentiment extends beyond single-event coverage, connecting to prior episodes where IAEA reports on enrichment levels correlated with volatility in USD funding markets and equity beta shifts.