Shareholders 35% loss in P.A.M. Transportation Services (NASDAQ:PTSI) partly attributable to the company's decline in earnings over past year

Despite a recent 12% share price increase, P.A.M. Transportation Services, Inc. (NASDAQ:PTSI) has underperformed in the last year, with a 35% drop. With EPS also down 81%, investors need to assess the company's future prospects.