IMF Working Papers describe research in progress by the author(s) and are published to elicit
comments and to encourage debate. The views expressed in IMF Working Papers are those of the
author(s) and do not necessarily represent the views of the IMF, its Executive Board, or IMF management.
IMF Working Papers describe research in progress by the author(s) and are published to elicit
comments and to encourage debate. The views expressed in IMF Working Papers are those of the
author(s) and do not necessarily represent the views of the IMF, its Executive Board, or IMF management.
This paper argues that securities transaction taxes "throw sand" not in the wheels, but into the engine of financial markets where the transformation of latent demands into realized transactions takes place. The paper considers the impact of transaction taxes on financial markets in the context of four questions. How important is trading? What causes price volatility? How are prices formed? How valuable is the volume of transactions? The paper concludes that transaction taxes or such equivalents as capital controls can have negative effects on price discovery, volatility, and liquidity and lead to a reduction in the informational efficiency of markets.