Westport Innovations' (NASDAQ:WPRT) stock has been on a tear since May 1, climbing 35% following a strong earnings report.

In the video below, Foolish contributor Jason Hall looks at what's happening with Westport, and helps investors understand what moves should be considered. Additionally, he talks about Wesport partner and competitor Cummins (NYSE:CMI), suggesting some investors should give this titan of the engine business a close look as well. 


Jason Hall owns shares of Westport Innovations. The Motley Fool recommends Cummins and Westport Innovations. The Motley Fool owns shares of Cummins and Westport Innovations. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.