President Donald Trump said Sunday that Iran's response to the latest U.S. peace proposal to end the war was "totally unacceptable" [1].

The rejection signals a potential deadlock in diplomatic efforts to resolve a conflict that has already lasted 10 weeks [2]. This stalemate increases the risk of prolonged military engagement and threatens the stability of global energy markets.

Trump spoke from Washington during a press briefing, where he said the Iranian reply was insufficient for ending the hostilities [3]. The administration expressed specific concerns regarding the continuation of fighting, the efficacy of current sanctions, and the strategic control of the Strait of Hormuz [3].

"Totally unacceptable," Trump said [1].

The diplomatic friction had an immediate impact on financial markets. Oil prices surged higher following the statement [2], while U.S. stock-index futures fell [4].

Market volatility reflects investor anxiety over the security of oil transit through the Strait of Hormuz. The U.S. proposal sought to establish a framework for peace, but the administration maintains that the Iranian terms do not meet the necessary requirements for a sustainable ceasefire [3].

Trump's decision to publicly reject the offer suggests a shift toward a more rigid negotiating posture. This approach aims to pressure Iran into offering more significant concessions before the U.S. agrees to a formal peace treaty [3].

"Totally unacceptable."

The failure of this peace proposal suggests that neither the U.S. nor Iran is currently willing to compromise on core strategic interests, particularly regarding regional influence and maritime security. By labeling the response 'totally unacceptable,' the U.S. is likely leveraging economic pressure and the threat of continued conflict to force Iran into a more favorable agreement, though this increases the short-term risk of market instability and military escalation.