KEY POINTS
  • Shares of Kroger plunged Tuesday after the U.S. grocery chain released a disappointing fiscal 2019 outlook.
  • Wolfe Research analyst Scott Mushkin said that Kroger isn't the only grocer struggling to make ecommerce profitable.
  • Ever since Amazon bought Whole Foods, other grocery chains have been forced to step up their tech investments.
An employee bags a customer's purchases at a Kroger store in Peoria, Illinois.

Shares of Kroger plunged Tuesday after the company's earnings showed that its investments in tech and delivery services are taking a bigger bite out of its 2019 profits than expected, but it isn't the only grocery chain struggling to make e-commerce work.

"We're embracing this idea of omnichannel, but no one understands how we're going to make any money," Wolfe Research analyst Scott Mushkin said on CNBC's "The Exchange."