Last December, over 100 stocks were featured in our Top Picks for 2007 report. Now, at mid-year, we turn to the 20 advisors whose picks showed the strongest gains to get an update on their previous picks, as well as a new favorite stock for the second half of the year.

Mark Skousen, editor of Forecasts & Strategies and host of the July 4th investor think tank FreedomFest, chose Aluminum Corp. of China (NYSE: ACH), which rose 45% as of 6/1/07. Here is his original recommendation for ACH and his new favorite stock for the rest of 2007.

Updating his earlier selection, the advisor asks, "What's the future of a stock that has doubled in the past year, and up over 40% this year? I am tempted to take my profits and go elsewhere.

"But demand for alumina and aluminum remains strong. Aluminum prices have been flat for the year, but have more than doubled in five years. The company, commonly known as Chalco, is the world's number two alumina maker, and it beat forecasts with a 44% rise in second half earnings.

"The giant producer intends to enhance its global competitiveness and focus on expanding capacity and further acquisitions this year, aiding the nation's hunt for raw materials to feed a rapidly growing economy (8-9% GDP annual growth). Chalco is also China's largest aluminum maker.

"It reported a net profit of 5.0 billion yuan (US$645.7 million) for the six months ended December, bringing yearly profit to 11.745 billion yuan last year versus 7.02 billion yuan in 2005. Overall, I think Chalco can increase in price, but just in case we are wrong, let's set a protective stop of $30 a share, and sell if it hits this level on the downside."