During the morning trading, oil prices have gone up by more than $1/bbl.
Oil prices went up to highs over the year and continue to rise.
Oil prices decreased due to deteriorating demand prospects.
The American Petroleum Institute released data on the decline in US stocks last week.
Oil quotations went down slightly on Monday.
Benchmark oil prices declined on Friday despite expectations of new measures to support the US economy.
The situation with oil prices has not demonstrated stability over the past 4 months.