Negotiations between the U.S. and Iran over the Iranian nuclear program have reached a deadlock after the U.S. added new conditions to its proposal.

The stalemate threatens to prolong a conflict that has already lasted approximately 10 weeks [1]. A failure to reach an agreement could increase instability in the Strait of Hormuz region, a critical corridor for global energy supplies.

Iranian Foreign Minister Abbas Araghchi said that Iran doubts the seriousness of the U.S. regarding the talks [2]. This skepticism comes as the U.S. government deemed the latest response from Tehran unacceptable, leading to the current impasse [3].

Despite the diplomatic friction, financial markets previously reacted with optimism. The Dow Jones Industrial Average increased by 600 points [4] on a day when President Donald Trump signaled a willingness to engage in talks.

The conflict has persisted for more than two months, creating a volatile environment for international diplomacy [1]. While market indices surged on hopes of a breakthrough, the actual diplomatic progress remains stalled as of May 15, 2026 [2].

U.S. officials said that further conditions are necessary to ensure the security of the nuclear framework. Meanwhile, Iran continues to question whether the U.S. is acting in good faith or seeking to impose unsustainable terms on the Iranian government [2].

Talks over Iran’s nuclear program are at a deadlock

The divergence between market optimism and diplomatic reality suggests that investors are pricing in a resolution that the negotiators have not yet achieved. The deadlock indicates a fundamental gap in trust and requirements, where the U.S. is leveraging additional conditions to secure a more stringent deal while Iran views these moves as evidence of bad faith.