Global stock markets post largest declines in months as Brent oil prices surge above $85/barrel and Trump says the US can fight "forever." 1. South Korea: -8% 2. Japan: -6% 3. South Africa: -6% 4. Germany: -5% 5. Spain: -5% 6. Italy: -4% 7. United Kingdom: -4% 8. France: -3% 9. Nasdaq 100: -2% 10. China: -2%