NEW YORK Oil prices plunged Monday to an 18-year low as the number of novel coronavirus cases worldwide surged past 750,000, reinforcing worries about the impact of the pandemic on the global economy. Meanwhile, US and European stock markets moved higher despite the prospect of much of the world remaining in confinement for weeks to come. Crude oil struck the lowest levels since 2002, with Brent North Sea tumbling to $21.65 a barrel at one point. The benchmark US contract, WTI, briefly fell below $20.00.—AFP