Tesla's stock hits an eight-month high after CEO Musk buys $1 billion worth of shares.

Tesla's stock surged after CEO Elon Musk bought over 2.5 million shares worth about $1 billion. The purchase has boosted the stock to an eight-month high, with shares up 6.4% to $421.33. This significant investment by Musk reflects his confidence in Tesla's future growth and has bolstered investor sentiment.