Elon Musk, CEO of SpaceX and Tesla, increased his fortune by $33.8 billion to $304.2 billion in a single day, becoming one of the largest one-day wealth increases in history. According to the Bloomberg Billionaires Index, Musk has once again eclipsed Amazon CEO Jeff Bezos, who is ranked second on the list with a wealth of $196 billion. On Monday, Tesla stock rose 13.5 percent. Musk holds around 18% of all Tesla shares and has followed through on his promise to reduce his ownership by 10%.Read more here