It could be a blip, it could be a trend, but stock prices for truck and bus manufacturer Navistar ^[1]soared just after the start of the new year.  The stock was trading below $20 a share during the holidays and then suddenly took off, hitting the low $30 mark January 5. Right now it seems settled in at about $28 a share. Curiously, the P/E ratio for Navistar is about 12 whereas all the other heavy equipment and industrial OEMs are charting much more affordable P/E ratios in the 6 to 9 range.