Spanish stock market structure and the introduction of the derivate securities on the IBEX-35 index.

Abstract

The debate about whether derivatives introduction and trading affect the underlying market stability persists for more than two decades. In this paper we deal with this question from a new perspective. Concretely, we investigate the impact on the underlying stock market structure of the IBEX-35 option and future listing. In this way, we define and identify the Spanish stock market structure for the whole period of study; and, afterwards, we analyse the effects that the new derivatives markets introduction has had on the stock market structure. Our results agree with others authors conclusions: though no generalised and essential change on the stock market structure have taken place, the new derivatives markets introduction seems to have affected a short number of firms included in the IBEX-35 index.Stock market structure, derivatives markets introduction, statistical distance, cluster analysis