The correlation between crude oil and natural gas prices is no longer pertinent after reaching an inflection point in 2008 because of the shale revolution.

In the past, the prices of the two commodities have often moved alongside each other because of demand and supply issues. The price relationship reached an “inflection point after 2008 and they have since decoupled,” according to a May research report written by Adila Mchich, an energy economist of the CME, a Chicago-based commodities derivatives exchange.