U.S. stock futures were higher this morning, with the Dow futures gaining around 0.2% on Wednesday.Shares of Powell Industries, Inc. POWL fell sharply in today's pre-market trading after the company reported worse-than-expected fourth-quarter revenue results.Powell Industries reported quarterly earnings of $3.77 per share which beat the analyst consensus estimate of $3.55 per share. The company reported quarterly sales of $275.06 million which missed the analyst consensus estimate of $286.49 million.Powell ...