The anatomy of a 'supply crunch'

Market forces, Trump's tweets and the latest Opec+ agreement have helped shape global supply in recent months

Early this summer, Opec scrapped its commitment to supply restraint, reversing a long-held policy of keeping markets tight as part of an effort to maintain a price floor.  US President Donald Trump had turned up the pressure on the organisation's heavyweights through a series of tweets. "Oil prices are too high, Opec is at it again. Not good!" he Tweeted. Saudi Arabia, for its part, affirmed it would raise output, as crude oil prices reached heights not seen since the heady days of 2014.  On the face of it, Trump appeared to have succeeded in twisting Riyadh’s arm to release more barrels onto the market and take the edge off prices surging past $80 a barrel.  An Opec ministerial meeting in V