Telegraph.co.uk | Qatari stock market plunges and oil prices rise as Saudi Arabia cuts off diplomatic ties with Qatar Telegraph.co.uk Oil futures rose as much as 1.6pc in New York, paring the biggest weekly loss in a month. Qatar's main stock index tumbled about 8pc during early trading. While the diplomatic spat has not affected shipments, it raises the prospect of supply ... Oil prices jump after Saudi Arabia, other Middle East nations cut ties with Qatar Live: Oil prices rise as Arab nations round on Qatar over terror Oil jumps as Qatar ditched, London attacks hurt sterling |