Any thoughts that the sheer size of Tencent Holdings Ltd.’s omnipotent chat app would slow it down appear unjustified. Monthly active users for WeChat hit 1.083 billion in the September quarter, the company said. That’s one in every seven people on the planet. Even more interesting is the number of users it managed to add: 102.5 million from a year ...

The fight between Italy and the rest of the European Union (EU) over Rome’s rule-defying budget has only just begun, but it’s already causing serious damage. Above all, the dispute is delaying Europe’s plans to strengthen the monetary union. That’s an effort that cannot wait — because a crisis in Italy might test the resilience of the euro zone like ...

That obsolete smartphone stashed away in a drawer or closet may not look like a national security risk, but the Trump administration is contemplating treating it as one. Unscrupulous Chinese recyclers and manufacturers could transform old phones into “counterfeit goods that may enter the United States’ military and civilian electronics supply chain,” according to a draft rule. To prevent that ...