Proponents suggest that the tax would raise revenues for governments (at a time when such revenues are badly needed) and curb the excessive speculation that contributed to the global financial crisis.
In August 2012, France became the first eurozone nation in the wake of the financial crisis to implement such a tax, and so far, it's been a total failure.
In an
article for Risk.net, Hannah Collins explains that in France, the tax – which amounts to 0.2 percent on transactions involving buying or selling of shares of stock – is actually just shifting investors out of equities and into even riskier, more opaque products like derivatives and derivatives-based ETFs: