The aerospace and defense sector is trading sharply lower, primarily driven by a significant drop in Boeing (BA) shares. Reports emerged of a potential delay in the FAA certification for Boeing's 737 MAX 10 aircraft, causing the company's stock to fall over 6%. As Boeing is a major holding in the ITA ETF, this news has had a substantial negative impact on the fund. The decline is exacerbated by broader market weakness and negative sentiment across the industrials sector.