Lockheed Martin shares dropped 5% to $505.50, while Northrop Grumman fell 6.2% to $516.05. The broader iShares U.S. Aerospace & Defense ETF retreated 1.7% to $238.57, reflecting a sector-wide decline fueled by President Trump’s recent memorandum with Iran, which effectively signaled a pivot away from the high-demand climate of the recent Middle East conflict.

Simultaneously, Defense Secretary Pete Hegseth signaled a potential retreat from European military commitments, warning that U.S. contributions to NATO remain contingent on increased spending from member nations. While lawmakers are scrambling to insert provisions into the 2027 military spending bill to stabilize troop deployments and weapon stockpiles in Europe, the same legislation carries a significant sting for corporate balance sheets.

Driven by Senator Elizabeth Warren and supported by President Trump, a new provision threatens to strip government contracts from any firm that prioritizes dividends or share buybacks over internal business investment. Although a narrow exception exists for companies that clear their reinvestment plans through the Defense Secretary, the prospect of federal intervention in shareholder returns has left Wall Street bracing for a new era of constrained capital allocation.