The views expressed in this Working Paper arc those of the author(s) and do not necessarily represent those of the IMF or IMF policy. Working Papers describe research in progress by the author(s) and are published to elicit comments and to further debate.Several Asian emerging market economies have recently adopted measures to limit the offshore trading of their currencies. This paper provides a general overview of such measures and evaluates the experiences of selected countries that resorted to such measures. It concludes that the measures could be effective if they were comprehensive and effectively enforced, and were accompanied by consistent macroeconomic policies and structural reforms. Such measures, however, could adversely affect investor confidence, financial market development, and nonspeculative economic and financial activities, and impose administrative burden on all parties involved,