This paper presents and compares several time-series models for returns of broadbased stock indices. These models nest a nonlinear asymmetric GARCH (NGARCH) model as a special case. Some of these models are empirically motivated ad-hoc specifications others are derived from a representative...

Using computational linguistic techniques, we build an investor sentiment indicator extracted from the content of the electronic French press specialized in Financial and economic news for companies of the CAC40 index. We test the relationship between this indicator and abnormal returns...