4. Synthesis Energy Systems ( SYMX) Company Profile: Synthesis Energy builds plants that use proprietary gasification technology to convert low-rank coal and related wastes into higher-value energy products. Shares rallied in March after Synthesis Energy signed an agreement with China Energy Industry Holding Group for a cash investment of $83.8 million to support Synthesis Energy's business strategy in China, including project development and investment. Current Share Price: $4.18 (April 26) 2011 Total Return: 257% Analyst Ratings: Two research shops follow Synthesis, with Deutsche Bank rating the stock a "buy" with a $3 price target. The other firm, Johnson Rice & Co., rates the stock as "equalweight." TheStreet Ratings has a "sell" rating on the stock, which it has maintained for two years. The latest report cites several negative areas for Synthesis, most notably the company's poor profit margins.