Omnicom Group (OMC) is an advertising, marketing and corporate communications service provider that has performed extremely well over the past year and has the potential to sustain momentum in the near term. Consequently, if you have not taken advantage of the share price appreciation yet, it is time for you to add the stock to your portfolio. What Makes OMC an Attractive Pick? An Outperformer: The company stock has had an impressive run over the past six months. Shares of Omnicom have gained 19% compared w ...