Firefly Aerospace is trading 4.28% down now at $22.34 amid broad risk-off trading and pressure from higher Treasury yields. - On September 23, 2026, the Nasdaq was down 1.04% and the S&P 500 was down 0.65%. - Renewed inflation concerns are pressuring equity valuations, particularly growth-oriented stocks. - Firefly announced completion of a new cleanroom on September 22; the positive operational update does not clearly explain today’s decline.