It's been an ugly stock market for most investors. But famed inventor and investor Elon Musk is having an exceptionally bad year - not just on one investment - but two. Musk's holdings in solar panel installer SolarCity (SCTY) and electric car maker Tesla (TSLA) are down a staggering $3.3 billion - just this year. Musk is the largest single owner of both companies - which together have handed all investors total market value losses of $14.8 billion this year. Both Musk's companies have been falling out of favor with....
