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This article consisted of the application of the CAPM model on companies listed on the stock exchange of and related to the construction sector in Colombia during the period from January 1, 2015 to December 31, 2020. This research has a quantitative approach with a type of descriptive and longitudinal research. Its methodology consisted in the application of ordinary least squares to the daily volatilities of the asset based on the estimation of the betas, which mostly complied with the probabilistic values and the intercepts were not different from 0, which is consistent with the model hypothesis. As for the variables that accompany the model, the risk-free rate TFIT16240724 was chosen and the ICOLCAP index was chosen as the variable that measures the market risk. Finally obtained the results, these were evaluated, concluding that the beta coefficient is an acceptable indicator in the risk-return assessment of the asset during the period in question, however, as an estimator it is not effective, which reflects the ineffectiveness of the model. [ABSTRACT FROM AUTHOR]

This study analyzes the elasticities of demand and income from electricity for domestic and industrial use, for Colombia (2000-2011), by estimating demand equations by OLS. The impacts on macroeconomic variables, which generate changes in the price of electricity, are also estimated by using a VARX Frequentist and a Bayesian VARX (BVARX) and by using the a priori methodology of Sims and Zha (1998). It is concluded that electricity is a normal good for the industry and a necessary good for the domestic demand. Furthermore, when energy prices increase approximately 20 %, the quarterly GDP growth falls to 1 % and it is stabilized one year and a half after the positive shock. [ABSTRACT FROM AUTHOR]