Crude oil prices extended their decline on Aug. 5 as traders reduced the geopolitical risk premium tied to disrupted shipping through the Strait of Hormuz. Why Are Crude Oil Prices Falling Today? WTI Crude Oil Tests $72.70 SupportThe four-hour WTI chart shows strengthening bearish momentum after oil broke below the important $78.10 level. WTI Support. Brent Backwardation.