Doryab, Bahar; Salehi, Mahdi - In: Journal of economics, finance & administrative science 23 (2018) 44, pp. 95-112
Purpose This study aims to use gray models to predict abnormal stock returns. Design/methodology/approach Data are collected from listed companies in the Tehran Stock Exchange during 2005-2015. The analyses portray three models, namely, the gray model, the nonlinear gray Bernoulli model and the...