Testing The Validity of Postmodern Theory of Portfolio from Market Based Model: An Empirical Evidence from Emerging Economy of Pakistan

Abstract

This study is aimed to test the validity of the postmodern theory of portfolio with the help of the market-based model, and 100 companies’ data has been used for the period 1st Jan, 2005 to 1st Feb, 2021 for listed companies at PSX. The explanatory power of CAPM is tested with the risk measures beta, idiosyncratic risk, semivariance/downside risk (Yildiz & Erzurumlu, 2018) and value at risk (VaR). Results of the GARCH (1,1) model indicates that E(R) DR and E(R) VaR has a significant impact on volatility by adding the-se explanatory measures in the variance equation. Whereas risk parameters significantly impact volatility, as shown by adding explanatory measures in the mean equation. The estimated returns and risk indicators of both global and local companies have essential explanatory capacity. In contrast, results suggest that to the MSCI index, the downward market integration is greater, and T-Bill prices may be the dominating factor.