Federal Express will get a bump if UPS goes on strike.

"Taking a strike authorization vote doesn't mean workers can strike. It simply gives the leadership permission to call for a strike vote if talks reach an impasse. Also, because of federal law governing airline labor contracts, including those involving aircraft mechanics, a more extensive process must unfold - including a 30-day cooling off period. If the parties can't reach terms, a mediator would have to release the sides before a worker strike or a lockout by the company."