when fixed exchange rates under the breton woods system were replaced with flexible exchange rates in 1971 there was a massive movement of funds between different currencies that threatened to destabilize the economy in addition the rise in short term currency speculation encouraged by the nature of the free currency market increased the economic costs incurred by countries exchanging currencies 
the tobin tax proposed by james tobin in 1972 seeks to mitigate or eliminate these issues the tax has been adopted by a number of european countries and the european commission to discourage short term currency speculation and stabilize currency markets the currency transactions tax does not impact long term investments it is only imposed on the excessive flow of money that moves regularly between financial markets through the actions of speculators in search of high short term interest rates the tax is paid by banks and financial institutions that profit from market volatility by taking excessive short term speculative positions in the currency markets the tobin tax was originally introduced by american economist james tobin 1918 2002 recipient of the nobel memorial prize in economics in 1981 according to tobin to work effectively such a tax should be adopted internationally and be uniform and the proceeds donated to developing countries although tobin suggested a rate of 0 5 other economists have put forward rates ranging from 0 1 to 1 but even at a low rate if every financial transaction taking place globally was subject to the tax billions in revenue could be raised the original intent of imposing the tobin tax has been skewed over the years by different countries implementing it while tobin s proposed tax on currency exchanges was intended to curb destabilizing capital flows across borders which makes it difficult for countries to implement independent monetary policies by moving money quickly back and forth between countries with different interest rates some countries now impose the tobin tax as a means of generating revenue for economic and social development example of the tobin taxfor example in 2013 italy adopted the tobin tax not because it was faced with exchange rate instability but because it was facing a debt crisis an uncompetitive economy and a weak banking sector by extending its currency transaction tax to high frequency trading hft the italian government sought to stabilize markets reduce financial speculation and raise revenue the tobin tax has been controversial since its introduction opponents of the tax indicate it would eliminate any profit potential for currency markets as it is likely to decrease the volume of financial transactions slowing global economic growth and development in the long run proponents state that the tax would help stabilize currency and interest rates because many countries central banks do not have the cash in reserve that would be needed to balance a currency selloff 