The series of oil price rollbacks on diesel implemented by oil companies this month are not enough because diesel prices are overpriced by a total of P6.45 per liter from January to September this year, according to research group IBON Foundation.
This estimate was the cumulative overpricing over the January to September period, computed based on the monthly movement of Dubai crude, diesel and pump prices, and the foreign exchange (forex) rate.
According to IBON research head Sonny Africa, the worst overpricing happened in June to August when oil firms used record Dubai prices to increase pump prices, and then rollback pump prices to less than what is justified. Overpricing in those three months amounted to a total of P13.50. Although there was underpricing recorded in some months since January, the price of diesel was still overpriced over the nine-month period.
Africa noted that this pattern has continued since the start of deregulation where diesel pump prices increased 1.7 times faster than Dubai crude prices in peso terms. The cumulative overpricing only shows that big oil firms use their monopoly over pricing to dictate pump prices that are beyond what can be justified by global crude oil price movements.