Rite Aid (NYSE: RAD) investors can’t seem to catch a break these days. Shares of the drugstore operator took a 12.4% hit last week, held back by a published report that regulators are stepping up their scrutiny of the company’s proposed purchase by Walgreens Boots Alliance (NASDAQ: WBA). Things didn’t get any better a day later, when CNBC reported that Amazon.com (NASDAQ: AMZN) may be making a push into this niche.