Boeing-Embraer deal on knife-edge as markets tumble

PARIS/SAO PAULO/SEATTLE (Reuters) - Brazil has upheld proposals by Boeing Co to buy the jetmaking arm of Embraer , but plunging markets have raised urgent questions over the fate of the $4.2 billion deal as aviation reels from the coronavirus crisis.Brazil's anti-trust watchdog dismissed prosecutors' objections to the politically sensitive deal on Wednesday.A slump in Embraer shares and cash concerns at Boeing driven by the impact of the coronavirus on air travel dealt a blow to the deal's..