President Recep Tayyip Erdogan vowed to boycott iPhones in a demonstration of defiance as the US held firm to its demand that Turkey release an evangelical pastor, and Turkish executives called for action to bolster the lira.

The ECB should keep providing a shield to the government securities of all monetary union members to avoid a dismantling of the euro system, a top politician from Italy’s ruling coalition said.

The butterfly effect is a description of how one seemingly irrelevant action has enormous consequences in an apparently unrelated outcome.