The defense sector experienced a significant downturn, with the ITA ETF falling 2.64%. This decline is largely attributed to a negative market reaction to the earnings report of GE Aerospace, a major component of the index. Despite beating revenue and earnings estimates, GE's stock fell as investors focused on margin pressures and ongoing supply chain constraints. This suggests a broader investor concern about profitability and execution within the sector, even amidst strong demand signals from global geopolitical tensions.