December 21, 2020 Prices of crude oil and oil-related ETFs are falling on Monday after a new strain of Covid that was uncovered in the U.K. generated new travel restrictions across Europe and worries that there may be more lockdowns globally, potentially hampering demand for fuel. Futures tied to West Texas Intermediate, the key U.S. crude measure, sank as low as $46.25, or over 6% Monday, before scrambling back toward $48 a barrel in early afternoon trade. International bellwether, Brent crude oil, tumbled 4.1% to $50.10 a barrel, its sharpest one-day drop since October. The U.K. governmen...