First Solar (FSLR) operates some of the world's largest solar power grid plants in the world. And business is booming: First Solar's sales so far this year are up 33% from a year ago.
Its stock has been volatile this year with major swings. But it's climbed up quickly since late September, and it's cheap. While many U.S. stocks are expensive -- measured by their price-to-earnings ratio -- First Solar is cheap. Its P/E ratio is 11.7. The S&P 500's P/E ratio is about 21.