Elon Musk's SolarCity technology is getting burned

It's not summer yet, but Elon Musk already has a nasty sunburn. SolarCity -- the solar-panel installer co-founded by two of Musk's cousins and chaired by the billionaire founder of Tesla and SpaceX himself -- slashed its 2016 installation forecast as it revealed a wider-than-expected loss. The dimmed outlook singed SolarCity shares, which tumbled 21...