Trump’s administration is considering imposing a Tobin Tax on capital flows, a move that could disrupt global financial markets.
Applying Tobin's idea of a 0.0005% tax on currency transactions in a global market could raise the huge amounts of revenue and likely wouldn't reduce the transactions or flows.
The Tobin Tax is a tax on foreign exchange transactions aimed at discouraging short-term speculative trading.
It was proposed in 1972 by James Tobin, a Nobel Prize-winning economist, in response to currency market fluctuations after the collapse of the Bretton Woods system.
India’s Securities Transaction Tax - 2004, acts as a Tobin-like tax on the stock market transactions.