Coinspeaker Walmart Stock Rises Over 1% as UBS Upgrades WMT to BuyWalmart (WMT) stock stays in the green zone as UBS analyst Michael Lasser placed an upgrade call at the retail giant’s shares. This call was inspired by the company's recent upgrade in tech, enhanced productivity, and massive eCommerce sales.Walmart Stock Rises Over 1% as UBS Upgrades WMT to Buy