KEY POINTS
  • Boeing's stock continued to slide after explosive messages revealed pilots' concerns about a flight-control system.
  • That system, known as MCAS, was implicated in two fatal crashes that killed 346 people.
  • Some of Boeing's suppliers, including Spirit AeroSystems, were trading lower.

Boeing shares continued their slide Monday after explosive messages last week revealed a top pilot had concerns about a system on the 737 Max that was later implicated in two fatal crashes.

Several Wall Street analysts downgraded Boeing, fretting about the fallout from the crisis that has barred the manufacturer from delivering its best-selling planes that make up around 40% of its profit.