A month has gone by since the last earnings report for American Tower (AMT) . Shares have lost about 8.3% in that time frame, underperforming the S&P 500.Will the recent negative trend continue leading up to its next earnings release, or is American Tower due for a breakout? Before we dive into how investors and analysts have reacted as of late, let's take a quick look at its latest earnings report in order to get a better handle on the important drivers.American Tower's Q4 AFFO & Revenues Beat Estimates, R ...