IOC's second quarter earnings were weak "because of lower refining margins and inventory valuation losses," Moody's Investor Service said in a report.
The company reported a negative refining margin of USD 2 per barrel in the quarter as against USD 2.3 per barrel gross refining margin (GRM) in first quarter.
"The fall in GRM was partly due to declines in regional refining benchmarks - which fell by USD 1 per barrel over the same period - and decreases in oil prices that resulted in inventory valuation losses," it said.
"But lower oil prices will lend some support to demand growth and may sustain margins at current levels or lead to some incremental improvements. We expect inventory valuation losses to increase in the quarter October-December owing to decline in oil prices since September but stabilize after that," it said.
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Moody's said the the deregulation of diesel prices along with declines in oil prices is expected to reduce fuel under- recoveries to around Rs 85,000 crore this fiscal compared to Rs 140,000 crore in 2013-14.
Borrowings will also fall when the government rolls out the Modified Direct Benefit Transfer Scheme from January 2015 in the entire country. Under this, the cost of subsidies for LPG cylinders will be directly transferred to the consumer and oil marketing companies, including IOC, will be able to sell their products at market prices.
Also, earnings will improve on commissioning of new refinery at Paradip.