The escalating confrontation between the United States and Iran over the latter’s nuclear program has triggered much debate about what actions should be taken to ensure that Iran does not develop a nuclear weapon. How might certain actions against Iran affect the global economy? FAS released the results of a study, “Sanctions, Military Strokes, and Other Potential Actions Against Iran” which assesses the global economic impact on a variety of conflict scenarios, sanctions and other alternative actions against Iran. FAS conducted an expert elicitation with nine subject matter experts involving six hypothetical scenarios in regards to U.S. led actions against Iran, and anticipated three month cost to the global economy. These scenarios ranged from increasing sanctions (estimated cost of U.S. $64 billion) to full-scale invasion of Iran (estimated cost of U.S. $1.7 trillion).