The retailer's weekly chart is on the cusp of being positive. Costco reports earnings late Wednesday.
Adobe Digital Insights says so far this holiday shopping season $52 billion has been spent online, but mobile sales are lagging.
Amazon.com is opening physical grocery stores that use an app for purchases instead of a checkout line.
Turns out Donald Trump doesn't hold any stocks at all, his spokesman said. Sold it all in June, he said, though Trump's camp has yet to provide any proof.