What Is Driving The Move In Boeing Stock?

A $10,000 holding in Boeing (BA) at Friday's close was worth about $9,310 after trading on Monday, September 28, 2026—a drop of roughly 6. 9%. The S&P 500 slipped 0. 8% that day, so the news was Boeing’s, even if the fallout is limited to Commercial Airplanes.

So what sent Boeing stock down on Monday.