Why Iraq's ISIS threat is a wake-up call to investors

For several years investors have looked at energy stocks through the spectrum of the US shale gas revolution. But the ISIS insurgency threatening Iraq is providing a reminder that oil security is a real concern, explains Guinness Global Energy manager Jonathan Waghorn.

Amid arguably inflated equity markets, and after years of underperformance, energy equities are offering a very attractive combination of good value and newly positive sentiment. Energy equity valuations...