**Ongoing US sanctions pressure, naval blockade effects, and elevated Iranian inflation are the main forces anchoring trader views on the USD/IRR rate at end-December 2026, with the three leading bands (2.0-2.5M, 2.5-3.0M, and 3.0-3.5M) separated by only a few percentage points.** Free-market rates have hovered near 2.65M IRR per USD in mid-October amid roughly 70-90% year-on-year inflation, GDP contraction, and sharply reduced oil exports following the US blockade of Iranian ports and intensified designations under Operation Economic Outcast. Recent Treasury actions targeting the remaining shadow fleet, Iraqi financial intermediaries, and additional vessels have further constrained Tehran’s access to foreign currency, sustaining depreciation pressure while Iranian authorities have responded with central-bank interventions and limited FX sales to stabilize the rate. The narrow spread among leading outcomes reflects uncertainty over whether these pressures will ease or intensify before year-end. Diplomatic progress on sanctions relief, oil-export waivers, or Strait of Hormuz normalization could support rial appreciation and pull the rate toward or below 2.5M. Conversely, additional sanctions, sustained export disruptions, or failure to contain inflation could push the rate above 3.0M. Traders are weighing these catalysts against historical patterns of short-lived rallies and the structural barriers posed by the current sanctions architecture.