Tesla shares soar after Elon Musk floats plan to take company private

Musk tweets plan as it emerges Saudi Arabia has built up $2.9bn stake in tech giantElon Musk has launched a campaign to take Tesla private on a day that included several provocative tweets, a suspension (and resumption) of trading in the company’s shares, reports of a significant Saudi investment, a surge in stock price, and an evocative, Musk-tinged appeal to the Tesla faithful: “The future is very bright and we’ll keep fighting to achieve our mission.”The ride started w