High volatility and enormous international capital flows are negative effects of the globalization of financial markets that can lead to financial crises like those of the 1990s. The Tobin tax often has been put forward as a measure to diminish globalization risks since it is claimed to...

In a simple portfolio choice model of two assets a foreign exchange transactions tax is implemented. We show that the graph in the mu-sigma[square] range is still a parabola and delineate its characteristics for altering tax rates. We presumed a risk avers investor seeking to minimize investment...