Boeing shares plunged 9.6% to $170.23 on Tuesday after the planemaker warned it would miss its 500-aircraft delivery target for 2026 and delayed its 737 production ramp-up. Boeing shares plunged 9.6% to $170.23 after the planemaker warned it would miss its 500-aircraft delivery target for 2026 and delayed its 737 production ramp-up. The company now expects $3 billion.