Boeing recently announced it was reducing to zero planes/month, from 42 planes/month, production of the 737 MAX which was already down from 52 planes/month following a second crash and the subsequent grounding of the plane in 4/19. Halting production will dramatically reduce industrial production, and if it lasts for all 20Q1, will reduce GDP by at least a quarter percentage point. The drag will reverse once production and shipping resumes.