Watch out: Jack Ma’s Singles Day is going to make Black Friday a lot less alluring. There’s trepidation in the air this holiday season. In just a few brutal trading days, the whipsawing US stock market wiped out its entire 2018 gain. Meanwhile, the US economy is heading for a 10th year of expansion, by far the longest in history. ...

Occam’s razor is a principle that says when something happens that can be explained in multiple ways, the simplest explanation is usually the right one. The same is true of solutions: the simplest, most straightforward solution is usually the best way to solve a problem. In the US, social media giant Facebook Inc. has become a problem. It makes its ...

Bloomberg European leaders gave Theresa May her Brexit deal but warned that the UK Parliament must vote for the plan as it stands because negotiations will not be reopened if British politicians reject it. On Sunday, the prime minister got her agreement on the UK’s divorce from the European Union at a special summit in Brussels, when the leaders of ...