Boeing (BA) shares are still in the red an hour out from Monday's market close. An incident involving a 737 Max 9 jet on an Alaska Airlines (ALK) flight has loomed over the stock all day. Yahoo Finance's Jared Blikre joins the Live show to break down stock market reactions to Boeing's downturn and what it could mean for shares of Boeing-supplier Spirit Aerosystem (SPR). For more expert insight and the latest market action, click here to watch this full episode of Yahoo Finance Live. Editor's note: This article was written by Nicholas Jacobino.