it's involving a new aircraft so critical to boeing's future and seth caplin says investors need to pay attention to these kinds of events. >> from a perception perspective for boeing, these things are not helpful. investors are going to be looking for some certainty here. they will be looking for, you know, is this just the latest thing? is there something else going forward we don't know about? >> not helpful to put it mildly and if the fire was not enough, in a accept brett incident a thompson airways 787 to florida was forceed to return to britain's manchester airport after a technical problem on board. all aboard were safe. officials haven't said what caused the problems on either plane, but investors didn't wait for an explanation. after hitting a 52-week high early today, boeing shares nosedived and caught in the downdraft, some of boeing's top suppliers and parts makers like spirit air systems down 2%. >>> coming up, the market monitor guest will say whether he thinks boeing is a good long-term investment. >>> that news overshadowed a tug-of-war on wall street today with blowout