Former Dollar General CEO Vasos is back and Wall Street cheers. Shares of discount chain up sharply

Shares of Dollar General are up more than 7% before the opening bell Friday after the discount chain said Todd Vasos will be returning as CEO after a streak of disappointing quarterly profits. The company has also wrestled with a number of labor issues. In July a National Labor Relations Board judge said that Dollar General violated federal labor law and “clearly intended to interfere” with worker rights in efforts to quell unionization at a Connecticut store.