Stock market purchases started session with a group rise today, thanks to Arab and Egyptian investor purchase operations, while foreign investors tended to sell. Stock market main index EGX30 rose by 1.7 percent, while medium and small companies' index EGX70 increased by 0.10 percent, whereas the broadest index EGX100 increased by 0.37 percent. A few stocks increased during the morning transactions such as Orascom Construction Industries' stock, which rose by 1.1 percent and Palm Hills stocks by 1.3 percent.