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:

US missiles hit Iran as path towards de-escalation uncertain
India's Modi under pressure as youth protest leaders set for more talks
US military says it's completed 13th consecutive night of strikes on Iran
Indian government seeks time on minister resignation demand
Israel launches military operation after deadly clash near Palestinian village
