So, for instance, because much of the world's financial transactions are denominated in U.S. dollars, placing an entity on one of these "blocked" lists could lead to the loss of financing in dollars by U.S. banks, the loss of its U.S. shareholders or the inability to continue any U.S. operations. This is a severe risk most companies are not willing to take. For proof, one need look no further than the list of major companies that have announced their exit from Iran since President Trump's announcement: French oil company Total SA, shipping company A.P. Moller-Maersk, Peugeot, GE, Boeing and Indian company Reliance Industries, Ltd.