The irony of the yuan rally that took bears by surprise last week was that the surge came just days before China announced that its foreign currency reserves shrank by $41 billion in December. The stockpile is now $3 trillion, a decline of more than $1 trillion since its peak in 2014. Authorities have been drawing upon the huge …

  Bloomberg Google is rolling out a real world application for its most ambitious virtual reality effort: letting shoppers see what they might buy without leaving home. The Alphabet Inc. unit introduced two new retail partnerships, with BMW and Gap Inc., deploying its 3D-scanning project called Tango. The technology uses cameras and sensors in mobile devices to overlay digital images …

  Bloomberg After a tough 2016, Fitbit Inc. has a plan to keep users hooked to its devices for the new year. Taking cues from the addictive nature of Facebook and other networks where people connect with friends, Fitbit is rolling out new social features on its app, including a news feed where users can share exercise summaries, read health-related …