Unlike some retailers, store closures will be a marker of strength for Walmart, according to former Walmart.com CEO Carter Cast.
"I think there are store closures ahead of Walmart that are going to be good for the company and good for shareholders," Cast said on CNBC's "Power Lunch."
Cast, who worked with Walmart from 2000 to 2007, applauded Walmart's efforts to adapt to online commerce, in a time of change for retail.