A number of methods have been suggested to improve forecasts for data sets subject to structural breaks. This article explains why one such procedure, the spline function technique, may not be a natural candidate. An example is given where data that appeared to be well forecast using spline...

Previously, it has been shown that the profits from a simple market timing trading rule applied to a portfolio of shares can be affected by the inter-relationships between the returns of the component securities. In this short letter, the results from applying a more sophisticated 'filter' rule...

In this short paper, I show that the characterization of the efficient securities market in Wang (1995) is inconsistent with financial economic theory, and offer a theoretically consistent alternative. By contrast, under this alternative definition of an efficient market, the component...

This paper complements earlier work by the author that shows that the pattern of information arrivals into the UK stock market may explain the behaviour of returns. It is argued that delays or other systematic behaviour in the processing of this information could compound the impact of...