Dow component Wal-Mart (NYSE: WMT) revolutionized the department-store retail industry, creating new emphasis on low pricing and value. Over time, the stock’s performance has also been strong, with solid performance and dividend yields that have provided income growth to investors over time as well. Yet one thing that investors haven’t enjoyed in nearly two decades is a stock split from the big-box retail giant, and ongoing difficulties could make it tough for Wal-Mart to break that drought in 2017.