Saudi Arabia's benchmark index is taking a beating as violent protests in Libya and demonstrations in other Arab countries rattle investors in the oil rich Gulf Arab states. Saudi Arabia's Tadawul All Shares Index was down almost 4.9 per cent by 3:30 p.m. local time on Sunday, with the declines hitting all sectors. Shares of the Saudi Basic Industries Corp., the world's largest petrochemicals maker, was down 2.6 per cent to 93.75 riyals. Dubai's Financial Market closed down 0.86 per cent, dropping to 1,466 points. Shares of developer Emaar Properties, the company behind the world's tallest building, fell 2.4 per cent.