CNBC | Op-Ed: Oil is hitting an 'invisible price ceiling' CNBC It is true that compared to other commodities such as gold, platinum, copper or coffee, crude oil has exhibited a higher degree of volatility going back several decades. Since 1996 crude prices have fluctuated as much as seven-fold, peaking at $148 ... Oil rises on Saudi offer to cut output as OPEC talks loom Canada is pumping so much oil to the U.S. there are not enough pipelines to carry it Oil scores 4th straight rise as US crude stocks decline again |