Arqit Quantum is trading 10.95% down at $20.08 after it stopped recognizing revenue under a material Middle East customer contract affected by regional geopolitical events. - Second-half fiscal 2026 revenue is expected at $355,000–$380,000, below $463,000 a year earlier. - Full-year revenue is estimated at $975,000–$1 million, versus $530,000 in fiscal 2025. - The company reported preliminary fiscal 2026 results on October 8. Broader markets were also weaker, with declines below 0.5%.