That OPEC’s spare oil production capacity was a problem that was only going to get worse with time became clear last year when the first reports began to emerge that the cartel and its partners led by Russia are not adding as much oil to their monthly output as agreed. Now, the gap between commitment and output has deepened, adding fuel to an already strong price rally. In December, OPEC+ added 253,000 barrels daily to its combined production falling well short of its 400,000-bpd target for yet another month in a growing row. Naturally, this fueled concern about the security...