4. Google ( GOOG) Company Profile: Google is the iconic Internet search and advertising tech giant. The company also builds Web applications and software, including the Chrome Web browser and the Android mobile operating system for handsets and tablet computers. Average Return Since 2004: 9.2% Best September Performance: +26.6% in 2004 Worst September Performance: -13.5% in 2008 Analysts Ratings: Google is massively popular with analysts, garnering 38 "buy" ratings from firms like Jefferies, Piper Jaffray and Stifel Nicolaus. The only other four analysts covering the stock say investors should hold on to shares. Google shares have underperformed the broader market, falling 10% this year, but analysts on average expect the stock to climb 34% from current levels.