The decision warns that Apple is subject to additional periodic fines in the future if it fails to comply with the Commission’s strict interpretation of the DMA, no matter how inherently punitive some of its demands may be. ( Can anyone else spell “tariffs”?)

The twin threats, delivered via social media, roiled global markets after weeks of de-escalation had provided some reprieve.

Stock markets declined after the president’s early-morning threats of 25 percent import taxes on iPhones and 50 percent on goods from Europe.