CNBC | Oil giants face slippery slope of earnings season CNBC A plunging oil price seems to be the culprit, with WTI, the main U.S. indicator, down 10.76 percent in July, and apparently set for its worst monthly performance since December 2015. Supply seems to have recovered, at the same time as concerns about ... BP Profit Sinks as Lower Oil, Weak Refining Strain Industry BP profits hit by lower oil price BP Oil misses quarterly profit expectations |