A common feature of financial time series is their strong persistence. Yet, long memory may just be the spurious effect of either structural breaks or slow switching regimes. So far, five testing procedures have been proposed to distinguish between true and spurious long memory. The tests are...

This study tests whether the behaviour of daily stock returns for the sample of three banks and the composite index in the Malaysian market are nonlinear dependence. Using three nonlinear testing procedures, the study suggests nonlinearity in the return series for all cases. The cause for the...

This paper investigates the intraday volatility pattern of the E-mini SP500 hourly returns. In order to account for the observed long memory and periodicity in returns volatility we introduce the Fractionally Integrated Periodic EGARCH and the Seasonal Fractional Integrated Periodic EGARCH. For...

We examine local-stochastic volatility models and derive a simple condition such models need to obey so that the carry P&L of a delta-hedged/vega-hedged position makes sense in a trading context.We give examples of admissible and non-admissible models and discuss the issue of the delta position...