This paper investigates the validation of the Mixture of Distributions Hypothesis (MDH) using trading volume and number of trades as contemporaneous proxies for information arrival in 15 sector indices of the Saudi Stock Exchange (Tadawul) using the TGARCH model. Findings provide strong evidence...

This study finds crude oil prices (`oil prices') affect market or portfolio expected returns on the NSE only via inducement of changes to risk aversion parameters of the `representative agent' who has exposure to both stock market return volatility risk and oil price risk. I refer to this effect...