4. JA Solar Holdings ( JASO) is a China-based manufacturer of high-performance solar power products.

Revenue for 2010 fourth quarter came in at $584.3 million, increasing 137% from $246.5 million registered in the fourth quarter of the prior year. Gross margin dropped to 19.2% from 20.6% in the earlier year quarter. Gross profit increased to $112.2 million from $50.8 million in same quarter of 2009.

Actual sales recorded for the fourth quarter were consistent with analysts' estimates. Earnings per share beat analysts' estimates by 61%.

Total solar products shipments for 2010 fourth quarter were 463 MW, growing 100% from 231 MW during the same period last year. Based on demand, JA Solar expects total cell and module shipments to surpass 2.2 GW in 2011, or a 50% increase from 2010.

Analysts have buy ratings of 52% and expect the stock to deliver 35% return in the next one year. The stock is trading at 4.9 times its estimated 2011 earnings.

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