It has been about a month since the last earnings report for Omnicom (OMC) . Shares have added about 3.3% in that time frame, outperforming the S&P 500.Will the recent positive trend continue leading up to its next earnings release, or is Omnicom due for a pullback? Before we dive into how investors and analysts have reacted as of late, let's take a quick look at the latest earnings report in order to get a better handle on the important drivers.Omnicom Q2 Earnings and Revenues Beat EstimatesOmnicom Group I ...