Boeing stock has been in freefall since an emergency door plug blew out of an Alaska Air Group 737 MAX 9 jet. Investors just don’t have a good way of estimating

how long MAX 9 jets will be grounded, and what it will end up costing Boeing in terms of customer compensation, repairs, and delayed and canceled orders—not to mention the less-quantifiable damage to the brand.

Source: finance.yahoo.com