Se evalúa el rendimiento ex-dividendo en acciones colombianas entre 1999 y 2007, periodo que incluye la conformación en julio de 2001 de la Bolsa de Valores de Colombia, resultado de la integración de tres bolsas previamente existentes. Contrario a la hipótesis de eficiencia de mercado, se...

We study the ex-dividend return in the Colombian stock market between 1999 and 2007, period that includes the merger of the former three Colombian stock exchanges in the Bolsa de Valores de Colombia in July 2001. Contrary to the Efficient Market Hypothesis, we found positive and statistically...

We give a new way to price American options, using Samuelson's formula. We first obtain the option price corresponding to a European option at time t, weighting it by the probability that the underlying asset takes the value S at time t. This factor is given by the solution of the Fokker-Planck...

We give a new way to price American options, using Samuelson´s formula. We first obtain the option price corresponding to a European option at time t, weighting it by the probability that the underlying asset takes the value S at time t. This factor is given by the solution of the Fokker-Planck...

This paper studies the influence of short sales bans on the Spanish stock market, and its objective is to know if this corrective measure has had positive effects on the market. To determine this influence, we have studied the profitability, risk and liquidity of Ibex 35 in the period between...

This paper studies the influence of short sales bans on the Spanish stock market, and its objective is to know if this corrective measure has had positive effects on the market. To determine this influence, we have studied the profitability, risk and liquidity of Ibex 35 in the period between...