BP and Shell hope to reassure investors this week after disclosing billion-pound losses.
Both oil giants are set to share trading updates for April to June.
Shares in BP have plunged more than 15 per cent since their peak in April.
Earlier this month it announced it was hit with losses between £781m to £1.6billion due to troublesome contracts.
It will be hoping the bad news is out of the way and investors can focus on more positive aspects of its update on Tuesday.
Reassurance: BP and Shell are set to share trading updates for April to June
And rival Shell will also give shareholders an insight into its performance on Thursday.
It already reported a loss of up to £1.6billion due to suspending work on a Dutch biofuel plant and selling a Singapore refinery.
Shares have dropped 1.4 per cent in the past month.
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