8. Yingli Green Energy Holding ( YGE) is the largest, vertically integrated photovoltaic manufacturer worldwide. The U.S. accounts for 10% of the company's global sales, while China has a 70% share. For fourth quarter of 2010, net revenue was $616.1 million and PV module shipments were up 21.6% sequentially, at record highs. Gross profit stood at $202.7 million, representing a gross margin of 32.9% for the quarter. Operating income was $142.9 million, indicating an operating margin of 23.2%. Net income was reported at $84 million for the quarter. Actual sales were 86% higher than analysts' estimates, while actual earnings per share were up 238% at $0.54 per share, topping analysts' estimates. The company pegs PV module shipments for 2011 between 1,700 MW and 1,750 MW, up 60.1%-64.8% from fiscal 2010. The stock has 45% buy ratings and is expected to deliver 21% return in the next one year. The stock is trading at 7.2 times its estimated 2011 earnings.