QUESTION 4 ADRs are securities, backed by Securities Exchange Commission (SEC), that permit U.S. investors to hold shares of non-U.S. companies and trade them in international A markets. securities, backed by American depositary shares (ADSs) that permit U.S. investors to hold shares of non-U.S. companies and trade them in U.S. markets . securities, backed by Securities Exchange Commission (SEC), that permit all investors to hold shares of U.S.companies and trade them in U.S. markets . securities, backed by American depositary shares (ADS), that permit non-U.S. investors to hold shares of U.S. companies and trade them in U.S. markets D