Tesla shares gain after Elon Musk discloses purchase of 2.57 million shares CNBCTesla's share price jumps after Elon Musk buys $1 billion worth of shares Business InsiderElon Musk Purchases About $1 Billion Worth of Tesla Shares Bloomberg.comTesla rallies to an eight-month high after Elon Musk buys more than $1B worth of shares (TSLA:NASDAQ) Seeking Alpha