From Investing.com:

Shares of Boeing (NYSE: BA) fell 8.94% to $226.74 on Monday, marking the lowest closing price since November 29. The stock has seen a 13.01% decrease month-to-date and year-to-date, but remains 8% higher than a year ago. The intraday fall was the largest since October 26, impacting the Dow Jones Industrial Average.



Read more: Boeing stock hits lowest close since late November after steep drop By Investing.com