Walmart's recent struggles have been hugely profitable for one group of investors (WMT)

Walmart's historically large stock decline since its latest earnings report has made hundreds of millions of dollars for short sellers betting on shares to fall. It has been a long time coming for speculative Walmart bears, who incurred over $1 billion in losses wagering against the company's stock in 2017. As Walmart slogs through one of its toughest patches in recent history, one group of investors has been left smiling: short sellers betting the company's stock will...