The brother of Tesla CEO Elon Musk has been selling Tesla stock. Kimbal Musk has been offloading shares in recent months, just as Tesla stock has made a massive retreat from all-time highs that put the stock, however briefly, among the select group of trillion-dollar companies.

A billionaire venture capitalist who has known Elon Musk for decades says there’s one crucial thing that Americans should understand about how the adviser to President Donald Trump operates. Musk doesn’t value the opinions of other people,

Even after adding President Donald Trump to his list of Tesla (TSLA) customers, Elon Musk is still having a tough month. TSLA stock has fallen significantly over the past few weeks, raising concern among investors that Musk’s lack of presence at the automaker’s manufacturing facilities is causing problems.