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Se estudia el problema de selección de la cartera bajo la hipótesis de que las rentas de los títulos individuales y de las carteras siguen distribuciones logarítmico-normales empleando como criterio de ordenación del conjunto de carteras el criterio de utilidad del riesgo fijado R-ε. Se proporciona el modo de obtener la cartera correspondiente a cada nivel de riesgo, así como el subconjunto de carteras eficientes.
This article gives an elementary introduction to stochastic finance (in discrete time). A formalization of random variables is given and some elements of Borel sets are considered. Furthermore, special functions (for buying a present portfolio and the value of a portfolio in the future) and some statements about the relation between these functions are introduced. For details see: [8] (p. 185), [7] (pp. 12, 20), [6] (pp. 3-6).
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