Reuters 3 minute read An investor looks at the screen at the Dubai International Financial Market in Dubai, UAE February 7, 2018. REUTERS/Satish Kumar Major stock markets in the Gulf rose in early trade on Tuesday, with the Qatari index marking a gain after four straight sessions of losses. Saudi Arabia's benchmark index (.TASI) added 0.6%, led by a 0.8% rise in Al Rajhi Bank (1120.SE) and a 3% leap in Riyad Bank (1010.SE). Saudi Arabia, the world's largest oil exporter, is facing a sharp recession because of the coronavirus crisis and depleted oil revenues. In Qatar, the index (.QSI) rose 0....