Saudi petchem firms as a whole saw profits rally for Q2 16 compared with the previous quarter. Yet half-yearly earnings are down 15%, with companies all reporting lower sales prices.

Saudi Arabia’s 14 stock exchange listed petrochemicals companies saw net earnings rise by 62.4% in the second quarter of 2016 compared with the first quarter, yet profits for the first half of 2016 were 14.8% down on the first half of 2015.

In statements published this week and last by the Saudi Stock...