Castellum is trading 5.6% down at $0.57 as broad risk-off trading pressured U.S. equities on September 1, 2026.
- The S&P 500, Nasdaq Composite, and Dow Jones were each down more than 0.5%; renewed Middle East tensions lifted oil prices and global bond yields, increasing inflation and interest-rate concerns.
- Reuters reported that rising borrowing costs were weighing on stocks worldwide.
- Castellum announced a positive $32.8 million NAVAIR contract modification on August 31; no new company-specific negative catalyst was identified for September 1.