OPEC and Russia have started an oil price war that could push crude into the $20s, according to Goldman Sachs Group Inc.
Brent crude may dip as low as $20 a barrel, testing the levels at which some producers can operate, analysts including Damien Courvalin wrote in a report. The move completely changes the outlook for oil and gas markets, the bank said, as it slashed its forecasts for the second and third quarters to $30 a barrel.