The local Hurst exponent, a measure employed to detect the presence of dependence in a time series, may also be used to investigate the source of intraday variation observed in the returns in foreign exchange markets. Given that changes in the local Hurst exponent may be due to either a...

Purpose ? To develop an integrated approach to forecasting spot foreign exchange rates by incorporating some principles underlying long-term dependence.Design/methodology/approach ? The paper utilises the random-walk framework to develop a stochastic forecast model wherein the sign (positive or...

When asset returns conform to a Gaussian distribution, the moments of the distribution over long return intervals may be estimated by scaling the moments of shorter return intervals. While it is well known that asset returns are not normally distributed, a key empirical question concerns the...