Why Has McDonald's Gone Quiet On Its Low-Income Customer?

McDonald's (MCD) stock fell 14.2% over the past 12 months, versus roughly 14.3% for the S&P 500, and now sits near its 52-week low. Over roughly the same stretch, management changed how it explains weak traffic. It used to point at customers outside its control. It now points at its own restaurants, and that makes the stock a different bet.