The iShares U.S. Aerospace & Defense ETF (ITA) closed down 1.05% at 152.88 on Monday, November 25th, as concerns over potential shifts in U.S. defense policy and geopolitical tensions weighed on the sector. The defense industry is facing uncertainty with the possibility of the Trump administration influencing the balance between traditional defense contractors and emerging tech firms, which could reshape the sector's landscape. Additionally, geopolitical developments, such as Greece and Turkey developing Israeli-inspired air defense systems, add complexity to the global defense environment. Meanwhile, the U.S. Air Force's recent $2.4 billion order for 15 more KC-46A aerial tankers from Boeing highlights ongoing demand for advanced military aircraft, yet it wasn't enough to offset broader market concerns.