A month has gone by since the last earnings report for CF Industries (CF) . Shares have lost about 1.2% in that time frame, underperforming the S&P 500.Will the recent negative trend continue leading up to its next earnings release, or is CF 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 most recent earnings report in order to get a better handle on the important drivers. CF Industries' Q2 Earnings Surpass Estimates, Sales MissCF In ...