The biggest thing underpinning Tesla Inc.’s valuation is the promise of growth. And the biggest head-scratcher to emerge over the course of January concerns how that growth is being funded. Bonus: On an earnings call, the company managed to not so much bury the lead as entomb it. Almost two weeks after the electric-vehicle maker announced it was laying off ...

Wirecard AG has strongly denied fraud allegations reported by the Financial Times last week. But that hasn’t stopped about $5.7 billion being wiped from the German fintech darling’s market value in a matter of days. Even if the allegations are as unfounded as the company says, there are valid questions about whether the payments processing specialist justifies its generous valuation. ...

Federal Reserve Chair Jerome Powell is an experienced central banker and won’t be surprised at the rough reception he’s been getting lately from analysts and commentators. This kind of treatment is traditional, almost mandatory, for a recently appointed Fed chief. Nonetheless, it shows he’ll have his work cut out in nudging the Fed towards the approach to monetary policy he ...