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Abstract
After being in force for several years, sanctions against Iran were partly lifted on 16 January 2016, reopening business options for the financial industry. This paper investigates whether a breach of internationally imposed economic sanctions had a negative impact on the value of a bank that decided to implicitly or explicitly violate those sanctions. Using event study methodology, our analysis provides evidence that a breach of Iran-related sanctions by foreign banks caused considerable wealth reductions for their shareholders who finally bear the corresponding fining-costs. The results also show that bank shareholders do not perceive the lifting of sanctions as being good news, implying that they lost faith in their bank's ability to establish a sufficient compliance and due diligence system for Iran-related transactions. Finally, the study shows that the announced fining for a breach of sanctions does not induce spillover effects to non-fined banks. Thus, the study provides important insights on reasons of the current shortage of foreign lending toward Iran.