plunged on Monday on a downgrade after an analyst at Canaccord Genuity downgraded the company's stock, citing near-term risk associated with its plans to maintain its current per-month delivery pace of 737 MAX shipsets. In a research note, Canaccord Genuity analyst analyst Ken Herbert downgraded Spirit AeroSystems to hold from buy, citing the company's "surprise move" to continue producing 737 MAX shipsets at its facilities, and then store the accumulated shipsets until Boeing needs them for production. "Spirit and Boeing have agreed to work together to minimize the disruption to Spirit operations and the supply chain," Spirit AeroSystems CEO Tom Gentile said in a statement on Monday.