Boeing shares rose two per cent on Thursday following reports that Iran may have mistakenly shot down a Ukrainian 737 jet on Wednesday.
The United States government believes that Iran downed the plane soon after it took off from Tehran.
The crash took place hours after Iranian rocket attacks on US forces in Iraq.
Early reports suggested the plane went down because of a mechanical problem.
Investors were concerned that could add to Boeing's long list of 737 problems and could further disrupt its business.