There will, of course, be losers (see article). Oil-producing countries whose budgets depend on high prices are in particular trouble. The rouble tumbled this week as Russia’s prospects darkened further. Nigeria has been forced to raise interest rates and devalue the naira. Venezuela looks ever closer to defaulting on its debt. The spectre of defaults and the speed and scale of the price plunge have unnerved financial markets. But the overall economic effect of cheaper oil is clearly positive.
Just how positive will depend on how long the price stays low. That is the subject of a continuing tussle between OPEC and the shale-drillers. Several members of the cartel want it to cut its output, in the hope of pushing the price back up again. But Saudi Arabia, in particular, seems mindful of the experience of the 1970s, when a big leap in the price prompted huge investments in new fields, leading to a decade-long glut. Instead, the Saudis seem to be pushing a different tactic: let the price fall and put high-cost producers out of business. That should soon crimp supply, causing prices to rise.