Why Is Allison Transmission (ALSN) Up 1.6% Since Last Earnings Report?

A month has gone by since the last earnings report for Allison Transmission (ALSN) . Shares have added about 1.6% in that time frame, underperforming the S&P 500.But investors have to be wondering, will the recent positive trend continue leading up to its next earnings release, or is Allison Transmission 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 driver ...