Theory is shale oil in the US is quickly scalable. When prices rise, so will production respond, quicker than in the past. Therefore, although price has smaller downside risk than upside potential (in many's view), the price may become capped at $75-80/barrel. If the $AU was to recover to say 90c/US, the potential profits are significantly less that was previously thought possible.
May be time to look at tech/healthcare, and dare I say materials, over oil/gas for long term investments.
