Effect on volatility One of the main economic hypotheses raised in favor of financial transaction taxes is that such taxes reduce return volatility, leading to an increase of long-term investor utility or more predictable levels of exchange rates. The impact of such a tax on volatility is of particular concern because the main justification given for this tax by Tobin was to improve the autonomy of macroeconomic policy by curbing international currency speculation and its destabilizing effect on national exchange rates.
Effect on volatility One of the main economic hypotheses raised in favor of financial transaction taxes is that such taxes reduce return volatility, leading to an increase of long-term investor utility or more predictable levels of exchange rates The impact of such a tax on volatility is of particular concern because the main justification given for this tax by Tobin was to improve the autonomy of macroeconomic policy by curbing international currency speculation and its destabilizing effect on national exchange rates.