For example, on June 16, 2017, the announcement of Amazon's offer to purchase the grocery chain Whole Foods caused a sharp, immediate drop in the stock value of other grocery chains, including even the mammoth [[Walmart]]. | For example, on June 16, 2017, the announcement of Amazon's offer to purchase the grocery chain Whole Foods caused a sharp, immediate drop in the stock value of other grocery chains, including even the mammoth [[Walmart]]. |