-parametric tests for jumps at the daily frequency to identify jumps at higher sampling frequencies. The suggested strategy allow for … identi�cation of the number of jumps and jump times during a day, as well as, the size and direction (negative or positive …) of the jumps. The method is of importance in order to facilitate detailed empirical studies concerning, for example …

The purpose of this note is three folds. First, we review Levy processes and analyse jumps. Second, we correct mistakes …