Manufacturing: "Here's How This Key Boeing Supplier Is Coping With the 737 MAX Grounding" [ Yahoo Finance ]. "Spirit, a one-time wholly owned subsidiary of Boeing, is still highly dependent on the company. Spirit is responsible for about 70% of the 737's structure, as well as a range of engine components and wing parts, and the 737 accounts for about half of Spirit's annual sales…. Boeing and Spirit in April signed an agreement that allowed Spirit to keep current production levels in place, with all airframes above Boeing's production rate being paid for upon completion but stored at Spirit facilities." • Hmm. I wonder if anybody's watching Spirit's facilities to see if they're filling up (like shorts watch Tesla lots).