4. RDA Microelectronics ( RDA) is a fabless semiconductor company that designs, develops and markets radio frequency and mixed-signal semiconductors. Revenue for the fourth quarter of 2010 was $57.5 million, increasing 74.4% from $33 million in the fourth quarter of 2009. Revenue for full year 2010 was $191.2 million, up 61.5% from $118.4 million for 2009. Gross margin for the fourth quarter of 2010 was 32.4%, compared to 20.1% for the fourth quarter of 2009. Adjusted net income was $10.2 million for 2010 fourth quarter as against $1.3 million for the same quarter in the prior year. In a press statement, the management said, "Looking ahead, we will continue to leverage our RF and mixed-signal design expertise to expand our highly integrated and innovative product offerings and provide more competitive solutions to our customers. We are encouraged that Chinese handset manufacturers continue to do well in emerging markets, which will be favorable for RDA going forward." The stock is trading at 12.9 times its estimated 2011 earnings with an expected upside of 33% over the next one year.