“…Moreover, based on this mechanism, overvalued portfolio firms outperform undervalued portfolio firms which are symbolized as (OMU) to see the relationship between Tobin-q factor and excess average portfolio returns in PSX. Nevertheless, practitioners and portfolio managers consistently use Tobin-Q technique to determine the value of an asset while investing in valuable long-terms assets (see Wang & Xiong, 2021;Qin, Luo, & Wang, 2021;He, Shi, Chang, & Wu, 2021;Tsai, Mai & Bui, 2021;Balfoussia & Gibson, 2019). It estimates whether firm is overvalued or undervalued in terms of operational efficiency.…”