We argue that a transaction tax is likely to amplify, not dampen, volatility in the foreign exchange markets.Our argument stems from the decentralised trading practice and the presumable discrepancy between informed and uninformed traders valuations.Since informed traders valuations are likely...

In this paper, we propose a new noncausal vector autoregressive (VAR) model for non-Gaussian time series. The assumption of non-Gaussianity is needed for reasons of identifiability. Assuming that the error distribution belongs to a fairly general class of elliptical distributions, we develop an...

No consensus has emerged on how to deal with overnight returns when calculating realized volatility in markets where trading does not take place 24 hours a day. This paper explores several common volatility applications, investigating how the chosen treatment of overnight returns affects the...