A month has gone by since the last earnings report for Amgen (AMGN) . Shares have added about 5.8% in that time frame, underperforming the S&P 500.Will the recent positive trend continue leading up to its next earnings release, or is Amgen 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 most recent earnings report in order to get a better handle on the important catalysts. Q2 Earnings & Sales BeatAmgen’s second-quarter results were s ...