Arcturus Therapeutics is trading at $11.88, down 5.83%, with biotech-sector weakness the clearest available context.

  • Biotech ETF XBI is down 2.01%, but this does not establish a direct cause.
  • No clear company-specific explanation for the October 13 decline was identified; the September clinical update and October 9 analyst action are earlier developments.
  • Biotech sentiment has also faced pressure from clinical setbacks, higher rates and investor caution; major indexes are only modestly lower.