Boeing shares tumbled over 5 per cent by midday trading on Wall Street on Tuesday as a number of nations have grounded the company's 737 Max 8 jet.
This follows Sunday's Ethiopia Airlines plane crash that killed all 157 people on board.
The United Kingdom and China are among those to ground these planes and the European Aviation Safety Agency is the latest body to suspend flight operations.
But the US isn't following suit. The Federal Aviation Administration said it would examine data from the crash and act on those findings.
William Denselow reports:

Kuwait air defences deal with Iranian missile, drone attacks
Nepal to rebuild early-warning system on China border after deadly flood, sources say
Two Palestinian teens killed in West Bank raid by Israeli settlers, army
Latest Indonesian free meal poisoning outbreaks affect 800, lawmaker says
Chinese students marooned in floods unleashed by Typhoon Saudel's rains
US and Iran exchange attacks as lull in war appears over
Malta court clears businessman over murder of investigative journalist
Kuwait confirms no injuries after Iranian drone hits residential complex
