Boeing shares fall 9% after mid-flight Alaska Airlines accident involving 737 Max 9 – as it happened

Rolling coverage of the latest economic and financial news, as Boeing shares fall after 171 of its 737 Max 9 aircraft are grounded by US regulators

• Oregon teacher finds fuselage from Boeing 737 Max 9 in his back yard
• Design flaws not suspected at this time' with Boeing Max 9 jets, investigators say
• Channel 4 plans deepest job cuts in over 15 years after TV ad slump

Shares in aerospace supplier Spirit AeroSystems, which builds the fuselage for Boeing's 737 Max, have fallen by over 16% in pre-market trading.

Reuters has reported that Spirit manufactured and initially installed the fuselage part on the Boeing 737 Max 9 jet that suffered a blowout on Friday, but that Boeing also has a key role in the usual completion process.