The price of the US dollar in Iran's open market surpassed 4,000 Iranian Rials this morning, September 21st, 2025, at approximately 7:45 AM UTC. This marks a significant increase in the currency's value against the national rial. This development was reported by Iran International, indicating a sharp depreciation of the Iranian currency in the open market during the reporting window. The exact reasons for this rapid escalation were not immediately detailed by the source. Further details regarding the economic factors contributing to this currency fluctuation are not yet available. The report from Iran International highlighted the exceeding of the 4,000 Rial mark as a key event.