“…For the selected model, we also estimate its GARCH‐in‐mean counterpart, which includes the conditional standard deviation as a regressor in the mean equation as follows The incorporation of the conditional standard deviation, which measures the risk, in the mean equation of the model is required for the identification and measurement of any risk–return relationship (Morley and Thomas, ; Karoglou et al ., ). Positive values of λ suggest that investors, especially risk‐averse ones, would demand a higher risk premium in return of increased risk, while negative values of λ indicate that investors would require lower risk premium during periods of high risk (Karoglou et al ., ; Lee, ).…”