- Capital asset pricing model was introduce by Sharp (1964) and Lintner (1965). The purpose was to calculate the risk level of relationship. However, the model lacks data and evidence of proving results, therefore, were being investigated rigorously. According to numerous empirical studies that there were 3 major approach models of interpreting and defining its genuine function of CAMP beat, the first approach was by Fama and MacBeth (1973), emphasize on the Sharpe-Linter CAPM (SLC), evidently, the theory model lacks explanation, which has advocate a controversial to the public and cast doubt on the theory of the model. Later on, Pettengill, Sundaram, and Mathur (PSM) (1995) impose dispute among the community regarding the Fama-MacBeth methodology on CAMP beta model. The PSM propose the SLC theory model was postulated regardless of valid evidence, which impel on the further dispute on theory of using the observable realized return on the unobservable expected return, in prior to rectify the genuine theory model. The reiteration of the model was to emphasize on the relevant of comply regarding high and low beta securities, for instant when the model is imply with the up market with high beta securities then the bearing of risk is high return than the low beat securities, but in down markets high-risk, high beta securities experience lower returns than low beta securities. Therefore, this concludes a bias against the finding a relationship between beat and returns. In prior of resolution the PSM has divided the data into up market and down market period based on the sign of realized market excess return. And the adjustment has indicated significant result on validity of the model development. There was another criticism on the Fama-MacBeth methodology, emphasizing on ordinary least squares (OLS) regression on constant beta risk. The following associates has the affiliation of the disputes; Harey (1989) and Ferson and Harvey (1991,1993), they suggest that the constant beta estimated by OLS may not capture the dynamics of beta. Jagannathan and Wang (1996) and Lettau and Ludvigson (2001) exhibit that the conditional CAPM wit ha time-varying beta outperforms the unconditional CAPM with a constant beta. Adrian and Franzoni (2004, 2005) argue that the econometric model failed to imitate the investors learning process of time-evolving beat and mat attempts to lead invalid estimation of beta. The genuine intention of the report is to identify the function of CAPM beta and time-varying beta. To reiterate the general view, it is to comply the variation of the model on capital and financial market on macroeconomic level and scale. In depth of prior of elaboration on the fluctuation and movement according to the validity and reliability of the model.