SolarCity Corp (NASDAQ:SCTY) stock has been on a huge run over the last year. The price has jumped from just $16.50 in early March of 2013 to over $82 today. That represents an over 450% annual return. The stock has, along with Apple Inc. (NASDAQ:AAPL) and Tesla Motors Inc (NASDAQ:TSLA), become one of the darlings of Wall Street, and has seemed bullet-proof even during market pullbacks.