Fushing, Hsieh; Chen, Shu-Chun; Hwang, Chii-Ruey - In: Quantitative Finance 12 (2012) 2, pp. 213-230
To investigate stock dynamics, we consider volatility as a temporal aggregation of semi-extreme events defined on three dimensions: return, volume and trading number. Onset and offset phases of volatility are computed by means of the hierarchical factor segmentation (HFS) algorithm based on...