What Could Derail Boeing Stock?

Shares of Boeing (BA) have lost 15.4% over the past twelve months, trailing the 17.0% returned by the S&P 500. A lack of customer demand is not the issue, as the aerospace company has a backlog of more than 6,200 airplanes that it has yet to deliver. Instead, the real challenge sits inside Boeing's own factories, a reality management has already acknowledged. So what is holding Boeing back.