Spanish Abstract: En el presente artículo se analiza si la propagación de un rumor referido a las acciones en un mercado influye o no en el comportamiento de los agentes al momento de tomar decisiones de inversión, y si este se correlaciona con la formación de burbujas. Para efectos de esta...

• Demonstration of outstanding investment performance due to noise filtering of covariance matrices in optimum portfolio selection exercises. This demonstration is based on the out-of-sample simulation of rebalancing trading done daily, weekly, biweekly and monthly.• Exhibits of investment...

Density forecasts have become quite important in economics and finance. For example, such forecasts play a central role in modern financial risk management techniques like Value at Risk. This paper suggests a regression based density forecast evaluation framework as a simple alternative to other...