For months after Ukraine's Western allies limited sales of Russian oil to $60 per barrel, the price cap was still largely symbolic. Most of Moscow's crude — its main moneymaker — cost less than that.
But the cap was there in case oil prices rose — and would keep the Kremlin from pocketing extra profits to fund its war in Ukraine. That time has now come, putting the price cap to its most serious test so far and underlining its weaknesses.
