text: I'm all for letting them fight their own battles.
  
  http://oilprice.com/Energy/Energy-General/Saudi-vs-Shale-The-Breakeven-Myth.html
  
  https://www.cnbc.com/2017/03/14/opec-us-shale-showdown-biggest-oil-risk-of-2017-says-energy-investor.html