Following a decline in global oil prices for more than a year and a half, in December 2015 the Saudi government announced domestic energy prices would rise overnight. On December 29, 2015 the price of petrol rose from SR0.60 ($0.16) per litre to SR0.90 ($0.24) for Octane 95, while 91-grade rose by more than 65%, from SR0.45 ($0.12) to SR0.75...