As the second half of the year begins, the bear market has nervous investors looking for any sign of a shift in the direction of the market. When the new earnings seasons kicks off Tuesday, Alcoa Inc.'s (NYSE: AA) second-quarter results may offer the first glimpse of what to expect going forward.

Pittsburgh-based Alcoa has missed earnings estimates in just two out of the past five quarters. When the leading aluminum producer reported first-quarter results back in March, its net income of 44 cents per share fell short of the consensus of analysts surveyed by Thomson Financial by four cents, and were down from 79 cents per share in the same quarter of 2007. For this current quarter, analysts expect earnings of 68 cents per share on $7.4 billion in revenue.

In recent news, power supply issues led Alcoa to idle its Rockdale, Tex., facility. The company announced a deal for bauxite mining and alumina processing in Vietnam. Alcoa was named one of the world's most ethical companies and recognized for the best safety performance in its industry. And back in early May, Klaus Kleinfield became Alcoa's president and CEO. For analyst upgrades and downgrades, as well as other news that could influence Alcoa's results, see BloggingStocks' Alcoa coverage.

Alcoa's long-term earnings per share growth forecast is 21.6%, which is less than the metals and mining industry average but better than the S&P 500. The consensus recommendation from analysts is to buy Alcoa, and has been for more than 90 days. The share price has been falling from a recent high of $44. 77 in mid May, and closed at $32.78 on Friday. Shares are down 10.3% year to date.

Bellwether General Electric (NYSE: GE) also reports later in the week, and may also help set the tone for the quarter and the rest of the year.

Visit AOL Money & Finance for more earnings coverage.

For 25 years, Steven Halpern, editor of TheStockAdvisors.com, has surveyed the leading financial newsletter advisors asking for their favorite stocks for the coming year. This article is one of 100+ ideas in the Best Stocks for 2008 report.

"Aluminum is one of our favorite commodities for 2008 and the best leveraged play on aluminum is Australia-based Alumina (NYSE: AWC)," explain co-editors Roger Conrad and Yiannis Mostrous in Vital Resource Investor.

"The company, our top conservative pick for 2008, owns 40% of Alcoa World Alumina and Chemicals, which, in turn, holds the world's largest, low-cost portfolio of quality bauxite and alumina assets.

"Having the world's largest integrated bauxite mining and alumina refining system (it provides approximately 13% of the world's alumina supply) in one place is the company's main attraction.

"As energy, raw materials and freight costs continue to increase, Alumina's setup makes its operations increasingly competitive and low cost versus those of rivals.

This article is part of a 20 article special report on "Metals, miners and money".

"We've added a high potential acquisition play to our model portfolio, Alumina Ltd. (NYSE: AWC)," note Elliott Gue and Yiannis Mostrous in their Vital Resource Investor.

The advisors explain, "The company is a leveraged bet on the recovery of aluminum prices in the next few quarters as China rationalizes output and exports by taking its high cost, heavily subsidized producers out of the game. Its small size and 40% stake in the world's largest low-cost portfolio of quality bauxite and alumina assets is a tempting target.

"Having the world's largest integrated bauxite mining and alumina refining system (it provides approximately 13% of the world's alumina supply) in one place is the company's main attraction. As energy, raw materials, and freight costs continue to increase, Alumina's setup enables its operations to be extremely efficient and low cost.

"The company is at a sweet spot because China's aluminum demand has been so strong that it's taken the industry by surprise. Although a large number of experts were at the start of the year forecasting 14% growth of China's aluminum demand for 2007, the latest projections (as per Alcoa's calculations) are pointing toward 35% growth.

"Further, China has a long way to go before it reaches the levels of consumption that more mature economies have achieved. And although it won't happen in one go, it will be a long and steady process. The bottom line: To meet this demand as well as demand from other countries like rapidly urbanizing rural India, aluminum production will have to grow much more rapidly than at any time in history."

What are the best speculations and investments among metals, miners, and other resource plays? To find out, I turned to 20 of the nation's leading newsletter editors, as well as speakers from the recent New Orleans Conference, a leading forum for resource advisors.

Their current top ideas cover a wide diversity of ideas, from gold and silver, from alumina and copper, to platinum and palladium. These picks cover markets from Chile to China and from Canada to Russia. These ideas also range from large cap, well-established, and diversified companies to small cap, development-stage junior speculations.

Readers should only consider these ideas as a starting place for their own research and should keep in mind the caveat that any stock you buy should only be considered within the framework of your own time horizon and risk parameters. Meanwhile, here are 20 different advisors assessing various aspects of the metals, mining, and resources sectors:

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."