Going private is one way to avoid the intense scrutiny of public markets.
"Funding secured", the tweet added, offering no further details on where the funds would come from or when.
"My hope is all current investors remain with Tesla even if we're private", Musk tweeted. "Already do this with Fidelity's SpaceX investment". They were initially driven higher after the Financial Times reported Saudi Arabia has quietly built a big stake in Tesla. I think he's serious.
Short interest in Tesla on Monday stood at almost US$12 billion, equivalent to 28 per cent of its float, according to S3 Partners, a financial analytics firm.
Daniel Ricciardo to leave Red Bull for ambitious Renault
However, Ricciardo will be counting down the races until his contract is over and he can move onto pastures new. Brown believes Ricciardo's surprise departure from Red Bull won't affect his team's or Alonso's plans for 2019.