CNBC | 3 charts show how oil is roiling world currencies CNBC Oil prices have been softening since the summer of 2014, recovering slightly this year before falling more than 5 percent on Monday. The decline is bad news for countries that rely on crude petroleum exports. A sudden drop in prices can dramatically ... Oil falls below $40 a barrel Oil tumbles up to 6 percent to new lows as China fears intensify rout Oil prices below $39 for first time since 2009 |