Validez del Supuesto de Neutralidad del Horizonte de Tiempo en el CAPM y la Metodología del Rango Reescalado: Aplicación a Colombia

La existencia de memoria de largo plazo en las series financieras implica que los retornos de un activo hoy pueden tener incidencia sobre los retornos futuros, incluso más allá del corto plazo. En presencia de dicha memoria el horizonte de inversión elegido puede resultar en diferentes condiciones de riesgo para el inversionista. Peters (1989 y 1992), Mandelbrot (1972), León y Vivas (2010), entre otros, encuentran evidencia de dependencia de largo plazo de las series de tiempo financieras y muestran sus principales implicaciones. Este documento se ocupa de extender el análisis al uso del supuesto de neutralidad del horizonte de tiempo en el CAPM, estimando el efecto cuantitativo de la existencia de dependencia de largo plazo en este modelo según lo desarrollado por Greene y Fieltz (1980). Los resultados para una muestra de acciones colombianas y estadounidenses muestran que la distribución de la medida del riesgo sistémico en el modelo, el beta, es estadísticamente diferente cuando se incorpora el efecto de dependencia de largo plazo; por lo tanto, los retornos esperados de estas acciones cambian. En el mercado colombiano se observa una sobreestimación del beta cuando no se realiza el ajuste propuesto, mientras que en las acciones estadounidenses analizadas el beta sin el ajuste se encuentra subestimado. En cuanto a los retornos esperados, estos son sobrevalorados al no tener en cuenta el ajuste por dependencia de largo plazo, tanto en las acciones colombianas como en las estadounidenses.CAPM, exponente de Hurst, dependencia de largo plazo, movimiento browniano fraccional, análisis de rango reescalado. Classification JEL: G12, G14, G32, G20, C14.

Does the Use of Foreign Currency Derivatives Affect Colombian Firms’ Market Value?

Classic financial theory relies on the absolute perfection of capital markets, which results in one of the milestones of theoretical corporate finance: the firm’s value is invariant to the choice of capital structure. As an extension to the aforementioned proposition by Modigliani and Miller (1958), corporate risk management is also futile. Nevertheless, it is clear that capital markets do not work with absolute perfection. There exist frictions which make risk management decisions essential for the firm’s value. Moreover, derivatives’ market vast importance is a good proxy of the relevance of hedging decisions for corporate finance. There is a remarkable volume of literature which tests the effects of risk management and hedging decisions for the value of the firm, mainly for the US corporate market. However, there is little effort on this subject for markets which work even farther from absolute perfection. This document undertakes such task for the Colombian market. Focused on non-financial firms and the local’s most liquid derivatives market, we find that for a panel of eight large Colombian corporations, the growth rate of Tobin´s Q depends significantly on firm´s size and hedging. Our results suggests that, after controlling for relevant financial variables such as firm´s profitability and leverage, and other variables such as firm´s age, an increase in hedging leads to a higher growth in the firm´s value.Modigliani-Miller, risk management, hedging, firm value, emerging market, Tobin´s Q. Classification JEL: G32, G30, L25.

Investment horizon dependent CAPM : adjusting beta for long-term dependence

Financial basics and intuition stresses the importance of investment horizon for risk management and asset allocation. However, the beta parameter of the Capital Asset Pricing Model (CAPM) is invariant to the holding period. Such contradiction is due to

Mercado de deuda corporativa en Colombia

Este artículo pretende analizar diferentes componentes del mercado de deuda corporativa (entendido como el de renta fija corporativa) con el fin de entender su funcionamiento, determinantes y características generales. La información que se pueda extraer de este mercado en desarrollo puede ser de utilidad para el análisis e instrumentación de políticas, más aún si este continúa profundizándose.El presente artículo consta de cuatro secciones aparte de la introducción. La primera establece un marco teórico; la segunda realiza comparaciones internacionales con países desarrollados y con la región; la tercera sección analiza en profundidad el mercado colombiano: los antecedentes, hechos estilizados, mercado primario, demanda y mercado secundario. Finalmente, se presentan las conclusiones

Reporte de Mercados Financieros - tercer trimestre de 2012

Este reporte hace una descripción de la dinámica del mercado financiero a nivel local, apoyándose en comparaciones internacionales. El entendimiento del comportamiento de los diferentes mercados es esencial para las entidades encargadas de la supervisión, para los participantes de dichos mercados y para las autoridades encargadas de establecer el marco regulatorio de los mismos

Measurement of t(t)over-bar normalised multi-differential cross sections in pp collisions at root s=13 TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

Peer reviewe

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe

An embedding technique to determine ττ backgrounds in proton-proton collision data

An embedding technique is presented to estimate standard model tau tau backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed mu mu events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at root s = 13 TeV corresponding to an integrated luminosity of 41.5 fb(-1).Peer reviewe