Wall Street is bailing on its one-time retail darling Costco after Amazon’s deal for Whole Foods
Wall Street is increasingly worried about Amazon's threat to Costco after the e-commerce giant's $13.7 billion deal to buy Whole Foods Market. Costco shares fell 7 percent Friday on the news. And now one trading day after Goldman Sachs downgraded Costco, another bank is following suit. Deutsche Bank on Monday lowered its rating for Costco to hold from...