Boeing shares sold off during the session following news that the FAA will delay the certification of the 737 MAX 10 due to a newly identified software bug. The issue, which affects automated landing guidance during go-around procedures, drew increased regulatory scrutiny throughout the day and compounded concerns that first emerged late last week. While the company maintained that there is no immediate safety issue, the uncertainty regarding the timeline for the largest variant of the MAX program weighed heavily on the stock, causing it to significantly underperform its peers in the aerospace and defense sector.