Food

Amazon.com Inc. spent its first day as the owner of a brick-and-mortar grocery chain cutting prices at Whole Foods Market as much as 43 percent.

In a sign of how the retailer is changing, the Amazon Echo, a voice-activated electronic assistant, was also for sale, for $99.99—a sharp pivot into electronics for a company known for kale and quinoa. The Echo Dot, a smaller version, was advertised for $44.99.

Amazon swooped in to buy the high-end grocer Whole Foods on Friday, paying $13.7 billion, or $42 a share—a healthy 27% premium on the previous day's closing price.

So what's in it for Amazon?

There are a couple of strategic plays at work for the online retail giant.

For starters, acquiring Whole Foods' 440 US stores—many of them in prime locations—could bolster the network for AmazonFresh, the company's grocery delivery service.