Plug Power is trading 4.2% down now at $2.03, with the immediate cause unclear.

  • The stock is reversing part of its September 17 rally.
  • No fresh company-specific announcement or clearly confirmed catalyst explains the September 18 decline.
  • The September 16–17 investor roadshow highlighted margin recovery and a path toward positive EBITDA in the fourth quarter; broader markets are only modestly lower.