In fact, we already have a financial transaction tax. It is called stamp duty, and it has existed for a long time.
Let me say something about the opinions of markets outside the European Union. Representatives of other jurisdictions are appalled by the plans, particularly our major trading partners. In the United States, the Investment Company Institute says that the tax would “'crash across borders”, and that
“All investors would be hit.”
The US Government also have serious misgivings: the Treasury Secretary, Jack Lew, has said that, despite objections from financial and non-financial trade associations and Government officials in the United States, Canada, Australia, Japan, Korea and other countries regarding the global reach and negative impact of the proposal, their concerns remain unanswered.