Executive slams short-seller Andrew Left's report.
Shortseller Andrew Left says Jumia's post IPO stock jump is built on fraud.
Boeing's big demand driver is stinging the stocks of its biggest customers.
The aircraft maker has an uncanny ability to bounce back from bad news, and already is showing a tendency to do so in current trading.
A tragedy in the skies is taking its toll on Boeing shares.
The hotel giant's shares have regained lost ground heading into its earnings release Monday night, though it does face trade and geopolitical issues.