Accelerating world oil demand and reduced supply from the Organization of the Petroleum Exporting Countries (OPEC) could push crude prices up to $60 a barrel before the end of the year, according to a report from Barron's.

The report cites research from Citigroup senior energy analyst Eric Lee, who previously called for a bear market in oil when the price was above $100. The decline in recent weeks to a low of just over $44 for Brent crude LCOc1, the international benchmark, has made Lee a short-term bull, Barron's notes.

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