A long discussion in literature exist to answer the question how a fund manager can generate extra returns? In order to answer the question this study is concerened with two aspects of this problem. First at discuss the portfolio construction process from separation theorem to modern style tilts. And in second step it provide imperical evidence for superior performance of style tilts. First of all active and passive style of management are compared. Data on returns is taken from KSE for five years and two sets of style based portfolios are constructed. Strong evidence is found in favor of active style of management. Actively managed funds are used as proxy for tilted portfolios. Data of Net asset value is taken from MUFAP. Tilted portfolios are tested for Size and value tilts. This study confirms higher performance of portfolio with style tilts.