Elon Musk's net worth crosses $250 billion as Tesla shares hit record highs

World's richest person Elon Musk's net worth crossed $250 billion as shares of Tesla hit fresh all-time highs on Friday. The electric car maker's stock closed at around $910 per share, taking its market value to more than $900 billion for the first time ever. Musk reportedly has a stake of more than 20% in Tesla.