Investors in Rite Aid (NYSE: RAD) had another rough month. The company's stock shed 28.2% of its value in March, according to data from S&P Global Market Intelligence, over fears that its pending takeover by Walgreens Boots Alliance (NASDAQ: WBA) might not go through.Image source: Getty Images.Rite Aid's stock took a tumble in early March after the New York Post published an article saying that Walgreens was considering forcing the Federal Trade Commission to vote on its pending merger.