when you buy shares in Tesla, by default you are buying shares in Elon Musk's vision. If I was a shareholder and I saw the founder and driver behind the company selling a large chunk of his shareholding to divest his portfolio, I'd be concerned and it is that concern that may have driven the share-price. His time will be less focused on Tesla, his vision turned elsewhere
Absolutely. Also Tesla now face a number of huge challenges, that shareholders would really like to see it's founder, driver & visionary fully focus on e.g.
- competition from awesome car companies like Porsche, Mercedes, Lexus etc in high end electric car production, roll out & marketing.
-Roll out of charging & other support infrastructures
- supply chain issues
- dealer network & consolidating it's place in the market place
As a group of shareholders you don't really want to see your brilliant but attention loving founder buying into an expensive distraction like Twitter, that's just going to get that founder into more spats like trouble with the SEC , etc.
If Tesla &/or Musk had announced a takeover of a car company such as say Jaguar or Aston Martin, or a battery company, or even a wind , solar, or something more complementary shareholders could maybe see a fit.
But twitter, yes it may offer some free advertising, profile building of its founder, and targeting of potential customers but other than that it's still a new media, loss making, cash guzzling, virtual distraction.....
And Musk's businesses are in automotive engineering, innovation and other related areas. A curious & distracting move for founder & shareholders imho.