Arqit Quantum is trading 6.83% down at $21.00 after a broad risk-off move following the September 23, 2026, equity selloff.

  • U.S. stocks declined as the 10-year Treasury yield reached its highest level since 2007, pressuring rate-sensitive growth stocks.
  • No fresh company-specific catalyst was identified for September 24; Arqit’s latest announcement was the September 22 Babcock secure-communications demonstration.