English to Italian Bus/Financial Finance (general) globalizzazione

The Tobin tax rate that is contemplated usually lies in the vicinity of 0.10 to 0.25 percent. Consider, e.g., a tax of 0.10 percent. For a speculator to be willing pay this tax on a very short term transaction that he plans to undo within a day, he must expect a return from the transaction of at least 0.20 percent on a daily basis (so that he can more than cover the tax on the round trip), or 7.4 percent on an annual basis. The tax would be prohibitive for any return differential below that threshold. Therefore it would curb financial transactions in pursuit of small short-term returns and would allow interest rates to diverge in different jurisdictions.